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2x/5+x=210
We move all terms to the left:
2x/5+x-(210)=0
We add all the numbers together, and all the variables
x+2x/5-210=0
We multiply all the terms by the denominator
x*5+2x-210*5=0
We add all the numbers together, and all the variables
2x+x*5-1050=0
Wy multiply elements
2x+5x-1050=0
We add all the numbers together, and all the variables
7x-1050=0
We move all terms containing x to the left, all other terms to the right
7x=1050
x=1050/7
x=150
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