Complete the 2 column proof.

Given m<rst = 5x and m<uvw = 7x
<rstand <uvw are supplementary.

Prove x=15

m<rst=5x and m<uvw=7x <rst and <uvw are supplementary given

m<rst + <uvw = 180 definition of supplementary angles

5x+7x = 180 ?

12x=180 ?

x=15 ?

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