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30+2k+3k=100
We simplify the equation to the form, which is simple to understand
30+2k+3k=100
We move all terms containing k to the left and all other terms to the right.
+2k+3k=+100-30
We simplify left and right side of the equation.
+5k=+70
We divide both sides of the equation by 5 to get k.
k=14
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