Question

Допожіть будь ласка
Знайди корінь рівняння:
1) 3(x - 4) = x;
2) -(4x - 3) = -x;
3) 5(x - 2) = 2x;
4) 4(x - 3) = 3(x + 1);
5) 3(-x - 1) = -(2x + 3);
6) -4(2 - x) = 5(x + 2).

Answer 1

3(x - 4) = x;

3x - 12 = x

3x - x = 12

2x = 12

x = 6

-(4x - 3) = -x;

-4x + 3 = -x

-4x + x = -3

-3x = -3

x = 1

5(x - 2) = 2x;

5x - 10 = 2x

5x - 2x = 10

3x = 10

x = 10/3

4(x - 3) = 3(x + 1);

4x - 12 = 3x + 3

4x - 3x = 3 + 12

x = 15

3(-x - 1) = -(2x + 3);

-3x - 3 = -2x - 3

-3x + 2x = -3 + 3

-x = 0

x = 0

-4(2 - x) = 5(x + 2)

-8 + 4x = 5x + 10

4x - 5x = 10 + 8

-x = 18

x = -18