Question 277235
-2(5+6m)+16=-90
-10-12m+16=-90
-12m=-90+10-16
-12m=-96
m=-96/-12
m=8 ans.
Proof:
-2(5+6*8)+16=-90
-2(5+48)+16=-90
-2*53+16=-90
-106+16=90
90=90