Question

Помогите, дам 90 баллов, срочно.
1) 5(х+2)=2(12-х);
2)2(4-3х)+3(х-2)=3;
3) 3(х+1)=2(1-х)+6;
4) 5,4(0,5х+4)=8,1(4+х)

Answer 1

Ответ:

Смотри решение на фото...

Answer 2

Ответ:

1)

$5(x + 2) = 2(12 - x) \\ 5x + 10 = 24 - 2x \\ 7x = 14 \\ x = 2$

2)

$2(4 - 3x) + 3(x - 2) = 3 \\ 8 - 6x + 3x - 6 = 3 \\ - 3x = 1 \\ x = - \frac{1}{3}$

3)

$3(x + 1) = 2(1 - x) + 6 \\ 3x + 3 = 2 - 2x + 6 \\ 5x = 5 \\ x = 1$

4)

$5.4(0.5x + 4) = 8.1(4 + x) \\ 2.7x + 21.6 = 32.4 + 8.1x \\ - 5.4x = 10.8 \\ x = - 2$