5(2k+5)-15=40

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Solution for 5(2k+5)-15=40 equation: 



5(2k+5)-15=40

We move all terms to the left:

5(2k+5)-15-(40)=0

We add all the numbers together, and all the variables

5(2k+5)-55=0

We multiply parentheses

10k+25-55=0

We add all the numbers together, and all the variables

10k-30=0

We move all terms containing k to the left, all other terms to the right

10k=30

k=30/10

k=3

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