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4x+9(13-x)=4.90
We move all terms to the left:
4x+9(13-x)-(4.90)=0
We add all the numbers together, and all the variables
4x+9(-1x+13)-(4.9)=0
We add all the numbers together, and all the variables
4x+9(-1x+13)-4.9=0
We multiply parentheses
4x-9x+117-4.9=0
We add all the numbers together, and all the variables
-5x+112.1=0
We move all terms containing x to the left, all other terms to the right
-5x=-112.1
x=-112.1/-5
x=22+2.1/5
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