5m = 7 + 4m
subtract 4m from both sides
1m = 7
m = 7
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Oops. That first solution lost the '8' from the left side.
An attempt to check the given equation with "m=7" fails.
Try it like this:
5m + 8 = 7 + 4m
Subtract 4m from each side:
m + 8 = 7
Subtract 8 from each side:
m = -1
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It is: 9m +8 -4m +7 -5m = 15
4m = 28 m = 7 You first put all the "m"s on one side so it becomes 4m = 28 You then divide 28 by 4 and you get 7 I'm not completely sure if it's right
m = 4
4m + 3m = 180 7m = 180 m = 25 5/7
If: -4m -7 = 17 Then: m = -6