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23=7x+2-4x
We simplify the equation to the form, which is simple to understand
23=7x+2-4x
We move all terms containing x to the left and all other terms to the right.
-7x+4x=+2-23
We simplify left and right side of the equation.
-3x=-21
We divide both sides of the equation by -3 to get x.
x=7
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