Question

решите уравнение.............................

Answer 1

7-х/3=х+8
7-8=х+х/3
-1=3х/х+х/3
-1=4х/3
-1*3=4х
4х=-3
х=-3:4
х=-0,75

Answer 2

$7- \frac{x}{3} =x+8 \\ \frac{21-x}{3} =x+8 [*3 \\ 21-x=3(x+8) \\ 21-x=3x+24 \\ -x-3x=24-21 \\ -4x=3 \\ x= - \frac{3}{4}$