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9-4(2-1)=45
We simplify the equation to the form, which is simple to understand
9-4(2-1)=45
Simplifying terms in parentheses
9-4*(+1)=45
Reorder the terms in parentheses
9+(-4)=45
Remove unnecessary parentheses
+9-4=+45
We move all terms containing to the left and all other terms to the right.
0=+45-9+4
We simplify left and right side of the equation.
0=+40
0=40
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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