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x-(x*0.1)=637.88
We move all terms to the left:
x-(x*0.1)-(637.88)=0
We add all the numbers together, and all the variables
x-(+x*0.1)-(637.88)=0
We add all the numbers together, and all the variables
x-(+x*0.1)-637.88=0
We get rid of parentheses
x-x*0.1-637.88=0
Wy multiply elements
x-0.1x-637.88=0
We add all the numbers together, and all the variables
0.9x-637.88=0
We move all terms containing x to the left, all other terms to the right
0.9x=637.88
x=637.88/0.9
x=708+0.68/0.9
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