3 years ago

What is this and how do i solve

Mathematics

1 answer:

Troyanec [42]3 years ago

8 0

Answer:

Step-by-step explanation:

The angles 7x° and (x + 20)° are supplementary angles.

Supplementary angles add up to 180°.

Therefore we have the equation:

7x + (x + 20) = 180

7x + x + 20 = 180 <em>subtract 20 from both sides</em>

8x = 160 <em>divide both sides by 8</em>

x = 20

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