Question

пожалуйста ответте на вопрос срочно нужно даю 10 балов​

Answer 1

Ответ:

$1)2x = 18 - x \\ 2x + x = 18 \\ x = 6 \\ 2) 7x + 3 = 30 - 2x \\ 7x + 2x = 30 - 3 \\ 9x = 27 \\ x = 3$

$3)7 - 2x = 3x - 18 \\ - 2x - 3x = - 18 - 7 \\ - 5x = - 25 \\ x = 5$

$4)0.2x + 2.7 = 1.4 - 1.1x \\ 0.2x + 1.1x = 1.4 - 2.7 \\ 1.3x = - 1.3 \\ x = - 1$

$5)5.4 - 1.5x = 0.3x - 3.6 \\ - 1.5x - 0.3x = - 3.6 - 5.4 \\ - 1.8x = - 9 \\ x = 5$

$6) \frac{8}{3} x + 15 = \frac{1}{6} x + 10 \\ \frac{8}{3} x - \frac{1}{6} x = - 15 + 10 \\ \frac{15}{6} x = - 5 \\ x = - 5 \times \frac{6}{15} \\ x = - 2$