Answer:
M=-36
Step-by-step explanation:
m = - 36
57=−3(m+5)+m
57=−3(m+)+m
57=(−3)(m)+(−3)(5)+m(
57=−3m+−15+m
57=(−3m+m)+(−15)(
57=−2m+−15
57=−2m−15
−2m−15=57
−2m−15+15=57+15
−2m=72 div 2
