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15x+9=3(5x+3)
We simplify the equation to the form, which is simple to understand
15x+9=3(5x+3)
Reorder the terms in parentheses
15x+9=+(+15x+9)
Remove unnecessary parentheses
+15x+9=+15x+9
We move all terms containing x to the left and all other terms to the right.
+15x-15x=+9-9
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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