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Sagot :
(9x + 20°) + 7x = 180° { supplementary angles}
or, 9x + 20° + 7x = 180 °
or, 16x = 180° - 20°
or, x = 160°/16
:. x= 10°
Now,
9x + 20° + 2y= 180° { supplementary angles}
or, 9* 10 + 20 + 2y= 180°
or, 110° + 2y= 180°
or, 2y= 180° - 110°
or, y= 70°/2
:. y= 35°
ps: double check everything, I don't have a calculator.
Answer:
X = 10°
Y = 35°
9x + 20 + 7x = 180° ( forming a linear pair)
9x + 7x + 20 = 180°
16x + 20 = 180°
16x = 180 - 20
16x = 160
x = 10°
7x = 2y ( vertically opposite angles).
7 (10) = 2y
70 = 2y
70/2 = y
35° = y
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