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0.75x+3.5=0.9x
We move all terms to the left:
0.75x+3.5-(0.9x)=0
We add all the numbers together, and all the variables
0.75x-(+0.9x)+3.5=0
We get rid of parentheses
0.75x-0.9x+3.5=0
We add all the numbers together, and all the variables
-0.15x+3.5=0
We move all terms containing x to the left, all other terms to the right
-0.15x=-3.5
x=-3.5/-0.15
x=23+0.05/0.15
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