Question

(5a-7)-3(a-4)=(-13)
Плз помагите

Answer 1

5a-7-3a+12=-13
2a+5=-13
2a=-13-5
2a=-18
a=-18:2
a=-9

Answer 2

5a-7-3a+12=-13
2a=-13+7-12
2a=-18
a=-9

Answer 3

Извините -9 ответ.