Question

Реши уравнение
1)-22-9х=143+6х
2)1/28у +4=13+1/7у

Answer 1

$1) - 22 - 9x = 143 + 6x \\ - 9x - 6x = 143 + 22 \\ - 15x = 165 \\ x = 165 \div ( - 15) \\ x = - 11 \\ 2) \frac{1}{28}y + 4 = 13 + \frac{1}{7}y \\ \frac{1}{28} - \frac{1}{7} = 13 - 4 \\ \frac{1}{28} y- \frac{1}{7}y = \frac{1 - 4}{28} = \frac{ - 3}{28} y \\ \frac{ - 3}{28}y = 9 \\y = \frac{9}{1} \times \frac{28}{ - 3} = - 84$