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15=0.19(x)+3.78
We move all terms to the left:
15-(0.19(x)+3.78)=0
We get rid of parentheses
-0.19x-3.78+15=0
We add all the numbers together, and all the variables
-0.19x+11.22=0
We move all terms containing x to the left, all other terms to the right
-0.19x=-11.22
x=-11.22/-0.19
x=59+0.0099999999999998/0.19
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