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.13x+.33(10-x)=2.5
We move all terms to the left:
.13x+.33(10-x)-(2.5)=0
We add all the numbers together, and all the variables
.13x+.33(-1x+10)-(2.5)=0
We add all the numbers together, and all the variables
.13x+.33(-1x+10)-2.5=0
We multiply parentheses
.13x-0.33x+3.3-2.5=0
We add all the numbers together, and all the variables
-0.2x+0.8=0
We move all terms containing x to the left, all other terms to the right
-0.2x=-0.8
x=-0.8/-0.2
x=+4
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