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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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15y ago

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