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x+x+1+x+2=72
We simplify the equation to the form, which is simple to understand
x+x+1+x+2=72
We move all terms containing x to the left and all other terms to the right.
+1x+1x+1x=+72-1-2
We simplify left and right side of the equation.
+3x=+69
We divide both sides of the equation by 3 to get x.
x=23
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