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2x+(-9)=0
We simplify the equation to the form, which is simple to understand
2x+(-9)=0
Remove unnecessary parentheses
+2x-9=0
We move all terms containing x to the left and all other terms to the right.
+2x=0+9
We simplify left and right side of the equation.
+2x=+9
We divide both sides of the equation by 2 to get x.
x=4.5
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