5m + 7 - 2m - 1 = 3m + 6
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Gather the m's and n's by rewriting it. 7m - 11n - n + 5m 7m + 5m -11n - n (7m + 5m) + (-11n - n) 12m - 12n ■
5m-13n-n+4m= (5+4)m+(-13-1)n= 9m-14n
5m-5n+5m+5n When simplified: 10m
4m + 9 + 5m - 12 = 42 9m -3 = 42 9m = 42 + 3 9m = 45 m = 5
(4+9)+(5−1242) = −1224 (I assume m stands for metres?)