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21+24m=28+21
We move all terms to the left:
21+24m-(28+21)=0
We add all the numbers together, and all the variables
24m+21-49=0
We add all the numbers together, and all the variables
24m-28=0
We move all terms containing m to the left, all other terms to the right
24m=28
m=28/24
m=1+1/6
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