-16 - 4m + 5m = 14 - 5m
−16−4m+5m=14−5m
−16+−4m+5m=14+−5m
(−4m+5m)+(−16)=−5m+14
m+−16=−5m+14
m−16=−5m+14
m−16+5m=−5m+14+5m
6m−16=14
6m−16+16=14+16
6m=30
6m/6=30/6
m=5
15 + 2n + 3n - 7 = 4n + 7
15+2n+3n−7=4n+7
15+2n+3n+−7=4n+7
(2n+3n)+(15+−7)=4n+7
5n+8=4n+7
5n+8=4n+7
5n+8−4n=4n+7−4n
n+8=7
n+8−8=7−8
n=−1
