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-21+3x=43-5x
We simplify the equation to the form, which is simple to understand
-21+3x=43-5x
We move all terms containing x to the left and all other terms to the right.
+3x+5x=+43+21
We simplify left and right side of the equation.
+8x=+64
We divide both sides of the equation by 8 to get x.
x=8
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