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-9=-4+x/13
We simplify the equation to the form, which is simple to understand
-9=-4+x/13
Simplifying:
-9=-4 + 0.0769230769231x
We move all terms containing x to the left and all other terms to the right.
-0.0769230769231x=-4+9
We simplify left and right side of the equation.
-0.0769230769231x=+5
We divide both sides of the equation by -00.0769230769231 to get x.
x=-65
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