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-4.2-(-3.8)+1.5=0
We simplify the equation to the form, which is simple to understand
-4.2-(-3.8)+1.5=0
Remove unnecessary parentheses
-4.2+3.8+1.5=0
We move all terms containing to the left and all other terms to the right.
0=0+4.2-3.8-1.5
We simplify left and right side of the equation.
0=-1.1
0=-1.1
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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