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-9(9/7-9)-(9/7+1)=1
We simplify the equation to the form, which is simple to understand
-9(9/7-9)-(9/7+1)=1
Simplifying:
-9*(+1.28571428571-9)-(9/7+1)=1
Simplifying:
-9*(+1.28571428571-9)-(+1.28571428571+1)=1
Simplifying terms in parentheses
-9*(-7.71428571429)-(+1.28571428571+1)=1
Simplifying terms in parentheses
-9*(-7.71428571429)-(+2.28571428571)=1
Reorder the terms in parentheses
+(+69.4285714286)-(+2.28571428571)=1
Remove unnecessary parentheses
+69.4285714286-(+2.28571428571+)=+1
Remove unnecessary parentheses
+69.4285714286-2.28571428571=1
We move all terms containing to the left and all other terms to the right.
0=+1-69.4285714286+2.28571428571
We simplify left and right side of the equation.
0=-66.1428571429
0=-66.1428571429
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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