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x+9x/20=7.25
We move all terms to the left:
x+9x/20-(7.25)=0
We add all the numbers together, and all the variables
x+9x/20-7.25=0
We multiply all the terms by the denominator
x*20+9x-(7.25)*20=0
We add all the numbers together, and all the variables
9x+x*20-145=0
Wy multiply elements
9x+20x-145=0
We add all the numbers together, and all the variables
29x-145=0
We move all terms containing x to the left, all other terms to the right
29x=145
x=145/29
x=5
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