m*10+m*10=138

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Solution for m*10+m*10=138 equation: 



m*10+m*10=138

We move all terms to the left:

m*10+m*10-(138)=0

Wy multiply elements

10m+10m-138=0

We add all the numbers together, and all the variables

20m-138=0

We move all terms containing m to the left, all other terms to the right

20m=138

m=138/20

m=6+9/10

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