Question

7m+12=-4m+78 solve this equation fast ok

Answer 1

7m + 12 = -4m + 78

Add 4m to both sides

7m + 4m + 12 = -4m +4m +78

11m +12 = 78

Subtract 12 from both sides

11m + 12 - 12 = 78 -12

11m = 66

Divide 11 from both sides

m = 6

Thank you.

Answer 2

Hey!
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$= > > 7m + 12 = - 4m + 78 \\ \\ = > > 7m + 4m = 78 - 12 \\ \\ = > > 11m = 66 \\ \\ = > > m = \frac{66}{11} \\ \\ = > > m = 6 \\ \\ \\ \\ = > > > check \: < < < = \\ \\ = > 7(6) + 12 = - 4(6) + 78 \\ \\ = > 42 + 12 = - 24 + 78 \\ \\ = > 54 = 54$
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