Question

14х-14=10х-10. 7-3х=5х-9 2,8х+3,7=1,4х-0,5. 3х+7=5х+18

Answer 1

Ответ:

1)14x-14=10x-10

14x-10x=-10+14

4x=4

x=1

2)7-3x=5x-9

-3x-5x=-9-7

-8x=-16

x=2

3)2,8x+3,7=1.4x-0.5

2.8x-1.4x=-0.5-3.7

1.4x=-4.8

x=-3

4)3x-5x=18-7

-2x=11

x=-5.5

Answer 2

Let's solve each of these equations step by step:

1. 14x - 14 = 10x - 10 First, we want to isolate the variable x. Start by moving all the x terms to one side of the equation and the constants to the other side: 14x - 10x = 14 - 10 4x = 4 Now, divide both sides by 4 to solve for x: x = 4 / 4 x = 1

2. 7 - 3x = 5x - 9 Start by moving the x terms to one side and the constants to the other side: 7 + 9 = 5x + 3x 16 = 8x Now, divide both sides by 8 to solve for x: x = 16 / 8 x = 2

3. 2.8x + 3.7 = 1.4x - 0.5 First, move the x terms to one side and the constants to the other side: 2.8x - 1.4x = -0.5 - 3.7 1.4x = -4.2 Now, divide both sides by 1.4 to solve for x: x = -4.2 / 1.4 x = -3

4. 3x + 7 = 5x + 18 Start by moving the x terms to one side and the constants to the other side: 3x - 5x = 18 - 7 -2x = 11 Now, divide both sides by -2 to solve for x: x = 11 / -2 x = -5.5

So, the solutions for the equations are:

1. x = 1
2. x = 2
3. x = -3
4. x = -5.5