12 = 7 - m
Add 'm' to each side of the equation:
m + 12 = 7
Subtract 12 from each side:
m = -5
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5m-7m = 12 -2m = 12 -2m/-2 = 12/-2 m = -6
7m-5 = 9 7m = 9+5 7m = 14 m = 2
If 7m = 4n+2 and 7m+2 = 8 m = 6/7 and n = 1
6
7m + 12We've examined it carefully looking for an 'equals' sign ( = ), but we've beentotally unsuccessful. So we know that it can't be an equation.It must be an expression.