Question

Помогите срочно!!!!!!!!!!!!!

Answer 1

2.

$26 - 4x = 8x - 7(x - 3) \\ 26 - 4x = 8x - 7x + 21 \\ - 4x - 8x + 7x = 21 - 26 \\ - 5x = - 5 \\ x = 1$

Вiдповiдь: 1

3.

$\frac{2x}{7} + \frac{x}{4} = \frac{15}{14} \: \: | \times 28 \\ \frac{28 \times 2x}{7} + \frac{28 \times x}{4} = \frac{28 \times 15}{14} \\ \frac{4 \times 2x}{1} + \frac{7 \times x}{1} = \frac{2 \times 15}{1} \\ 8x + 7x = 30 \\ 15x = 30 \\ x = 2$

Вiдповiдь : 2