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2.5x+0.45(x+8)=21.3
We move all terms to the left:
2.5x+0.45(x+8)-(21.3)=0
We add all the numbers together, and all the variables
2.5x+0.45(x+8)-21.3=0
We multiply parentheses
2.5x+0.45x+3.6-21.3=0
We add all the numbers together, and all the variables
2.95x-17.7=0
We move all terms containing x to the left, all other terms to the right
2.95x=17.7
x=17.7/2.95
x=5+1/1
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