Question

Пожайлуста Решите уравнения

Answer 1

Делаем накрест

0.7(х+3)=14×3.6

0.7х+2.1=50.4

0.7х=50.4-2.1

0.7х=48.3

х=69

Answer 2

$\frac{x + 3}{14} = \frac{3.6}{0.7} \\ x + 3 = \frac{14 \times 3.6}{0.7} \\ x + 3 = \frac{14 \times 36}{7} \\ x + 3 = \frac{2 \times 36}{1} \\ x + 3 = 72 \\ x = 72 - 3 \\ x = 69$