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(7990)=140-0.04x
We move all terms to the left:
(7990)-(140-0.04x)=0
We add all the numbers together, and all the variables
-(-0.04x+140)+7990=0
We get rid of parentheses
0.04x-140+7990=0
We add all the numbers together, and all the variables
0.04x+7850=0
We move all terms containing x to the left, all other terms to the right
0.04x=-7850
x=-7850/0.04
x=-196250
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