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0.9(x+7)=3
We move all terms to the left:
0.9(x+7)-(3)=0
We multiply parentheses
0.9x+6.3-3=0
We add all the numbers together, and all the variables
0.9x+3.3=0
We move all terms containing x to the left, all other terms to the right
0.9x=-3.3
x=-3.3/0.9
x=-3+0.6/0.9
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