simplified it equals, 9m+8
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It is: 9m +8 -4m +7 -5m = 15
3+4m+5m=214m+5m=21-39m=18m=18/9m=2
9m - 14n
It can be simplified to: 9m-2n
5m = 7 + 4msubtract 4m from both sides1m = 7m = 7=================================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 + 4mSubtract 4m from each side:m + 8 = 7Subtract 8 from each side:m = -1