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2+8-(1+2)=0
We simplify the equation to the form, which is simple to understand
2+8-(1+2)=0
Simplifying terms in parentheses
2+8-(+3)=0
Remove unnecessary parentheses
2+8-3=0
We move all terms containing to the left and all other terms to the right.
0=0-2-8+3
We simplify left and right side of the equation.
0=-7
0=-7
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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