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5x-2(x-3)+9=21/5
We move all terms to the left:
5x-2(x-3)+9-(21/5)=0
We add all the numbers together, and all the variables
5x-2(x-3)+9-(+21/5)=0
We multiply parentheses
5x-2x+6+9-(+21/5)=0
We get rid of parentheses
5x-2x+6+9-21/5=0
We multiply all the terms by the denominator
5x*5-2x*5-21+6*5+9*5=0
We add all the numbers together, and all the variables
5x*5-2x*5+54=0
Wy multiply elements
25x-10x+54=0
We add all the numbers together, and all the variables
15x+54=0
We move all terms containing x to the left, all other terms to the right
15x=-54
x=-54/15
x=-3+3/5
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