Question

3(x-1)-2(x + 2) = 7 - 2(2x + 1)​

Answer 1

Пошаговое объяснение:

$3(x - 1) - 2(x + 2) = 7 - 2(2x + 1)$

$(3x - 3) - 2(x + 2) = 7 - 2(2x + 1)$

$3x + ( - 2x - 4) - 3 = 7 - 2(2x + 1)$

$((3x - 2x) + ( - 3 - 4)) = 7 - 2(2x + 1)$

$x + ( - 3 - 4) = 7 - 2(2x + 1)$

$x - 7 = ( - 4x - 2) + 7$

$x - 7 = ( - 4x + (7 - 2))$

$x - 7 = - 4x + 5$

$4x + x - 7 = (4x - 4x) + 5$

$4x + x - 7 = 5$

$((x + 4x) - 7) = 5$

$5x - 7 = 5$

$5x + (7 - 7) = 7 + 5$

$5x = 5 + 7$

$5x = 12$

$\frac{5x}{5} = \frac{12}{5}$

$x = \frac{12}{5}$

Ответ: $\frac{12}{5}$

Answer 2

Ответ:

3(x-1)-2(x + 2) = 7 - 2(2x + 1)​

3x-3-2x -4 = 7 -4x -2

3x-2x+4x = 7 -2+3 +4

5x=12

x=12/5=2.4

Ответ: x=2.4