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72=10(-7-9e)+90e
We move all terms to the left:
72-(10(-7-9e)+90e)=0
We add all the numbers together, and all the variables
-(10(-9e-7)+90e)+72=0
We calculate terms in parentheses: -(10(-9e-7)+90e), so:We add all the numbers together, and all the variables
10(-9e-7)+90e
We add all the numbers together, and all the variables
90e+10(-9e-7)
We multiply parentheses
90e-90e-70
We add all the numbers together, and all the variables
-70
Back to the equation:
-(-70)
142!=0
There is no solution for this equation
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