Question

6 клас С.Р. No 19 Помогите пожалуйста срочно ​

Answer 1

1) А

$3x + 2 = 8 \\ 3x = 8 - 2 \\ 3x = 6 \\ x = 6 \div 3\\ x = 2$

2) Б

$- 5x - 4 = 7x + 2 \\ - 5x - 7x = 2 + 4$

3) В

$\frac{1}{3} x - 5 = \frac{2}{3} \: \: | \times 3 \\ \frac{3}{3} x - 5 \times 3 = \frac{2 \times 3}{3} \\ x - 15 = 2$

4) х - любое число

$5(x - 12) = 6(x - 10) - x \\ 5x - 60 = 6x - 60 - x \\ 5x - 6x + x = - 60 + 60 \\ 0 = 0$

5) -3

$5(x + 1.2) + 7 \frac{1}{2} = 0.5x \\ 5x + 6 + 7.5 = 0.5x \\ 5x - 0.5x = - 13.5 \\ 4.5x = - 13.5 \\ x = - 13.5 \div 4.5 \\ x = - 3$