0.9(x+10)+0.9x=90

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Solution for 0.9(x+10)+0.9x=90 equation: 



0.9(x+10)+0.9x=90

We move all terms to the left:

0.9(x+10)+0.9x-(90)=0

We add all the numbers together, and all the variables

0.9x+0.9(x+10)-90=0

We multiply parentheses

0.9x+0.9x+9-90=0

We add all the numbers together, and all the variables

1.8x-81=0

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

1.8x=81

x=81/1.8

x=45

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