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andrey2020 [161]

4 years ago

9

I had help but still don't understand plz help

1 answer:

erica [24]4 years ago

7 0

Two parallel lines are intersect by the same line, and the angles shown lie on the same orientation about the intersection so the angles are equal to each other...which means:

9x+21=10x+10 subtract 21 from both sides

9x=10x-11 subtract 10x from both sides

-x=-11 divide both sides by -1

x=11

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