Реши уравнения : ×:9+8=12 5×(15-×)-7=28

Question

Реши уравнения :
×:9+8=12






5×(15-×)-7=28

Answer 1

X:9=4
x=4*9
x=36



75-5x-7=28
75-7-28=5x
40=5x
x=8

Answer 2

[tex] \frac{x}{9} + 8 = 12 \\ \frac{72x}{9 } = \frac{12}{1} \\ 72x = 12 \times 9 \\ 72 \times = 108 \\ x = 1.5