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-3+4.5-(-1.2)=0
We simplify the equation to the form, which is simple to understand
-3+4.5-(-1.2)=0
Remove unnecessary parentheses
-3+4.5+1.2=0
We move all terms containing to the left and all other terms to the right.
0=0+3-4.5-1.2
We simplify left and right side of the equation.
0=-2.7
0=-2.7
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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