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2x+9=2(x+4)+1
We simplify the equation to the form, which is simple to understand
2x+9=2(x+4)+1
Reorder the terms in parentheses
2x+9=+(+2x+8)+1
Remove unnecessary parentheses
+2x+9=+2x+8+1
We move all terms containing x to the left and all other terms to the right.
+2x-2x=+8+1-9
We simplify left and right side of the equation.
0x=0
0=0
This equation is an identity, so all real numbers are solutions.
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