Question

1) 3х=9 2) -7х=49 3) х-12=-43 4) 6(х-2)=30 5) 5а=2а+6 6) 2х+7=32-8Х

Answer 1

Ответ:

1)3x=9

x=9÷3

x=3

2)-7x=49

x=49÷(-7)

x=-9

3)x-12=-43

x=-43+(-12)

x=31

4)6(x-2)=30

x-2=30÷6

x-2=5

x=5+3

x=8

5)5a=2a+6

5a-2a=6

3a=6

a=6÷3

a=2

6)2x+7=32-8x

2x+8x=32-7

10x=25

x=25÷10

x=2,5

Answer 2

It seems like you've provided a list of equations. It looks like you want me to solve these equations for the variable "x" or "a." I'd be happy to help you with that! Let's solve each equation step by step:

1. $3x = 9$ Divide both sides by 3: $x = \frac{9}{3}$ $x = 3$

2. $-7x = 49$ Divide both sides by -7: $x = \frac{49}{-7}$ $x = -7$

3. $x - 12 = -43$ Add 12 to both sides: $x = -43 + 12$ $x = -31$

4. $6(x - 2) = 30$ Divide both sides by 6: $x - 2 = \frac{30}{6}$ $x - 2 = 5$ Add 2 to both sides: $x = 5 + 2$ $x = 7$

5. $5a = 2a + 6$ Subtract $2a$ from both sides: $3a = 6$ Divide both sides by 3: $a = \frac{6}{3}$ $a = 2$

6. $2x + 7 = 32 - 8x$ Add $8x$ to both sides: $10x + 7 = 32$ Subtract 7 from both sides: $10x = 25$ Divide both sides by 10: $x = \frac{25}{10}$ $x = 2.5$

So, the solutions for the variables are:

1. $x = 3$
2. $x = -7$
3. $x = -31$
4. $x = 7$
5. $a = 2$
6. $x = 2.5$