Question

ДАЮ 60 БАЛОВ ПОМОГИТЕ ПРОШУУУУУ 1)2/3t-1/2t+2=1/4t-3, 2)1/2x+1/6x+5=x, 3)0,2f+2,3=0,7f-3,2, 4)-0,4x-14=0,3x, 5)-40·(-7x+5)=-1600, 6)(-20t-50)·2=100, 7)2,1·(4-6e)=-42, 8)-3·(2-15k)=-6, 9)-20·(x-13)=-220, 10)(30-7r)·8=352, 11)(2,8-0,1h)·3,7=7,4, 12)(3x-1,2)·7=10,5,

Answer 1

Ответ:

В приложении

Если мой ответ Вам помог

Отметте его ЛУЧШИМ

Answer 2

Sure, I'd be happy to help you solve these equations. Let's go through each of them step by step:

1. 2/3t - 1/2t + 2 = 1/4t - 3

To solve this equation, first, let's combine the terms with 't' on one side of the equation:

2/3t - 1/2t - 1/4t = -3 - 2

Now, find a common denominator for the fractions:

(8/12)t - (6/12)t - (3/12)t = -5

Combine the 't' terms:

(-1/12)t = -5

To isolate 't', divide both sides by -1/12:

t = -5 / (-1/12) t = -5 * (-12/1) t = 60

2. 1/2x + 1/6x + 5 = x

To solve this equation, first, let's find a common denominator for the fractions:

(3/6)x + (1/6)x + 5 = x

Combine the 'x' terms:

(4/6)x + 5 = x

To isolate 'x', move the (4/6)x to the right side:

x - (4/6)x = 5

(6/6)x - (4/6)x = 5

(2/6)x = 5

Now, divide both sides by 2/6:

x = 5 / (2/6) x = 5 * (6/2) x = 5 * 3 x = 15

3. 0.2f + 2.3 = 0.7f - 3.2

Let's isolate 'f' on one side of the equation:

0.2f - 0.7f = -3.2 - 2.3

Combine the 'f' terms:

-0.5f = -5.5

Now, divide both sides by -0.5:

f = -5.5 / -0.5 f = 11

4. -0.4x - 14 = 0.3x

Let's isolate 'x' on one side of the equation:

-0.4x - 0.3x = 14

Combine the 'x' terms:

-0.7x = 14

Now, divide both sides by -0.7:

x = 14 / (-0.7) x = -20

5. -40 * (-7x + 5) = -1600

Distribute the -40:

280x - 200 = -1600

Now, isolate 'x' by moving the constant term to the right side:

280x = -1600 + 200 280x = -1400

Finally, divide both sides by 280:

x = -1400 / 280 x = -5

6. (-20t - 50) * 2 = 100

Distribute the 2:

-40t - 100 = 100

Now, isolate 't' by moving the constant term to the right side:

-40t = 100 + 100 -40t = 200

Divide both sides by -40:

t = 200 / -40 t = -5

7. 2.1 * (4 - 6e) = -42

Distribute the 2.1:

8.4 - 12.6e = -42

Now, isolate 'e' by moving the constant term to the right side:

-12.6e = -42 - 8.4 -12.6e = -50.4

Divide both sides by -12.6:

e = -50.4 / -12.6 e = 4

8. -3 * (2 - 15k) = -6

Distribute the -3:

-6 + 45k = -6

Now, isolate 'k' by moving the constant term to the right side:

45k = -6 + 6 45k = 0

Divide both sides by 45:

k = 0

9. -20 * (x - 13) = -220

Distribute the -20:

-20x + 260 = -220

Now, isolate 'x' by moving the constant term to the right side:

-20x = -220 - 260 -20x = -480

Divide both sides by -20:

x = -480 / -20 x = 24

10. (30 - 7r) * 8 = 352

Distribute the 8:

240 - 56r = 352

Now, isolate 'r' by moving the constant term to the right side:

-56r = 352 - 240 -56r = 112

Divide both sides by -56:

r = 112 / -56 r = -2

11. (2.8 - 0.1h) * 3.7 = 7.4

Distribute the 3.7:

10.36 - 0.37h = 7.4

Now, isolate 'h' by moving the constant term to the right side:

-0.37h = 7.4 - 10.36 -0.37h = -2.96

Divide both sides by -0.37:

h = -2.96 / -0.37 h = 8

12. (3x - 1.2) * 7 = 10.5

Distribute the 7:

21x - 8.4 = 10.5

Now, isolate 'x' by moving the constant term to the right side:

21x = 10.5 + 8.4 21x = 18.9

Divide both sides by 21:

x = 18.9 / 21 x = 0.9

So, the solutions to the given equations are:

1. t = 60
2. x = 15
3. f = 11
4. x = -20
5. x = -5
6. t = -5
7. e = 4
8. k = 0
9. x = 24
10. r = -2
11. h = 8
12. x = 0.9