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Need help with this question, can someone help me out?

Need help with this question, can someone help me out?-example-1

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Answer: S = 3.5

Explanation:

We know that congruent means that the sides are equal. Knowing this, we can make an equation to solve for.

We can 2s+11=8s-10.

We can then subtract 2s from both sides, getting 11=6s-10.

We can then add 10 to both sides, getting 21=6s.

Dividing both sides by 6, we get 3.5=S.

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