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30(2x)+35(x)+35(x+3)=1275
We move all terms to the left:
30(2x)+35(x)+35(x+3)-(1275)=0
We add all the numbers together, and all the variables
337x+35(x+3)-1275=0
We multiply parentheses
337x+35x+105-1275=0
We add all the numbers together, and all the variables
372x-1170=0
We move all terms containing x to the left, all other terms to the right
372x=1170
x=1170/372
x=3+9/62
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