It has no solution since subtracting 4m from both sides leads to
-4 = 0 which is not true.
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4m+15=8m-5 or,4m=20 or,m=5
4m-5 equals = -1
3+4m+5m=214m+5m=21-39m=18m=18/9m=2
To solve for m, we must isolate m: (5-4m)/3 = -7 Multiply both sides by 3: 5-4m = -21 Subtract 5 from both sides: -4m = -26 Divide by -4: m = 13/2 = 6.5
-4m + 3 = -8 -4m = -8 -3 -4m = -11 4m = 11 m = 2.75