How do you solve $8.4m - 7= 7.4m - 7$ ?

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Answer 1 · 2017-03-11T22:53:36

See the entire solution process below:

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

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

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

$1m - 0 = 0 - 0$

$1m = 0$

$m = 0$

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