Answer:
32°
Explanation:
l₁ // l₂ and t is transversal. co interior angles are supplementary.
3x + 20 + 2x = 180
3x + 2x + 20 = 180
5x + 20 = 180
Subtract 20 from both sides,
5x = 180 - 20
5x = 160
Divide both sides by 5,
x = 160 ÷ 5
x = 32
(3x + 20) and 2x are same- side interior angles and sum to 180° , that is
5x + 20 = 180 ( subtract 20 from both sides )
5x = 160 ( divide both sides by 5 )
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