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-90=-5(5k-3)
We simplify the equation to the form, which is simple to understand
-90=-5(5k-3)
Reorder the terms in parentheses
-90=+(-25k+15)
Remove unnecessary parentheses
-90=-25k+15
We move all terms containing k to the left and all other terms to the right.
+25k=+15+90
We simplify left and right side of the equation.
+25k=+105
We divide both sides of the equation by 025 to get k.
k=4.2
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