Question

15-7
$15 - 7x = 42$
​

Answer 1

15 - 7х = 42

-7х = 42 - 15

-7х = 27

х = 27 : (-7)

х ≈ - 3,86 или $- \frac{27}{7}$

Answer 2

15-7x=42
7x=15-42
7x=27
x=27:7
x=3 6/7
Ответ 3 6/7