Answer:
M = -3
4(10m + 30)/5 = -3(m+3)
4x10(m+3)/5 = -3(m+3)
40(m+3)
=−3(m+3)
8(m+3)=−3(m+3)
8m+24=−3m−9
8m+24+3m=−9
11m+24=−9
11m=−9−24
11m=−33
m=−
11
33
m=−3
Hope I helped
