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7(4.5)+3(4.5)+5(4.5)+187.5=0
We simplify the equation to the form, which is simple to understand
7(4.5)+3(4.5)+5(4.5)+187.5=0
Reorder the terms in parentheses
+(+31.5)+3*(4.5)+5*(4.5)+187.5=0
Remove unnecessary parentheses
+31.5+3+*(+4.5+)+5+*(+4.5+)+187.5=0
Reorder the terms in parentheses
+31.5+(+13.5)+5*(4.5)+187.5=0
Remove unnecessary parentheses
+31.5+13.5+5+*(+4.5+)+187.5=0
Reorder the terms in parentheses
+31.5+13.5+(+22.5)+187.5=0
Remove unnecessary parentheses
+31.5+13.5+22.5+187.5=0
We move all terms containing to the left and all other terms to the right.
0=0-31.5-13.5-22.5-187.5
We simplify left and right side of the equation.
0=-255
0=-255
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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