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.5x+.3(2700-x)=1050
We move all terms to the left:
.5x+.3(2700-x)-(1050)=0
We add all the numbers together, and all the variables
.5x+.3(-1x+2700)-1050=0
We multiply parentheses
.5x-0.3x+810-1050=0
We add all the numbers together, and all the variables
0.2x-240=0
We move all terms containing x to the left, all other terms to the right
0.2x=240
x=240/0.2
x=1200
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