How do you solve 8.4m - 7= 7.4m - 78.4m−7=7.4m−7?

1 Answer
smendyka
Mar 11, 2017

See the entire solution process below:

Explanation:

Add color(red)(7)7 and subtract color(blue)(7.4m)7.4m from each side of the equation to solve for mm while keeping the equation balanced:

8.4m - 7 + color(red)(7) - color(blue)(7.4m) = 7.4m - 7 + color(red)(7) - color(blue)(7.4m)8.4m−7+7−7.4m=7.4m−7+7−7.4m

8.4m - color(blue)(7.4m) - 7 + color(red)(7) = 7.4m - color(blue)(7.4m) - 7 + color(red)(7)8.4m−7.4m−7+7=7.4m−7.4m−7+7

1m - 0 = 0 - 01m−0=0−0

1m = 01m=0

m = 0m=0

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