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14m+9=7(5-2m)-7
We move all terms to the left:
14m+9-(7(5-2m)-7)=0
We add all the numbers together, and all the variables
14m-(7(-2m+5)-7)+9=0
We calculate terms in parentheses: -(7(-2m+5)-7), so:We get rid of parentheses
7(-2m+5)-7
We multiply parentheses
-14m+35-7
We add all the numbers together, and all the variables
-14m+28
Back to the equation:
-(-14m+28)
14m+14m-28+9=0
We add all the numbers together, and all the variables
28m-19=0
We move all terms containing m to the left, all other terms to the right
28m=19
m=19/28
m=19/28
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