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54+9x=130-10x
We move all terms to the left:
54+9x-(130-10x)=0
We add all the numbers together, and all the variables
9x-(-10x+130)+54=0
We get rid of parentheses
9x+10x-130+54=0
We add all the numbers together, and all the variables
19x-76=0
We move all terms containing x to the left, all other terms to the right
19x=76
x=76/19
x=4
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