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12.15+0.12(x+3)=12.69-0.11
We move all terms to the left:
12.15+0.12(x+3)-(12.69-0.11)=0
We add all the numbers together, and all the variables
0.12(x+3)+12.15-(12.58)=0
We add all the numbers together, and all the variables
0.12(x+3)-0.43=0
We multiply parentheses
0.12x+0.36-0.43=0
We add all the numbers together, and all the variables
0.12x-0.07=0
We move all terms containing x to the left, all other terms to the right
0.12x=0.07
x=0.07/0.12
x=0.07/0.12
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