Question

-3x+2=5x-15
2x+7=-19
-4x+7=5x+1
2x-(4-5x)=-(-6-3x)
помогите решить​

Answer 1

Ответ:

$- 3x + 2 = 5x - 15 \\ 5x + 3x = 2 + 15 \\ 8x = 17 \\ x = \frac{17}{8}$

$2x + 7 = - 19 \\ 2x = - 19 - 7 \\ 2x = - 26 \\ x = - 13$

$- 4x + 7 = 5x + 1 \\ 5x + 4x = 7 - 1 \\ 9x = 6 \\ x = \frac{6}{9} = \frac{2}{3}$

$2x - (4 - 5x) = - ( - 6 - 3x) \\ 2x - 4 + 5x = 6 + 3x \\ 2x + 5x - 3x = 6 + 4 \\ 4x = 10 \\ x = 2.5$