Answer:
x = 25°
Explanation:
angle sqr + pqs must = 180
2x-10 is a complementary angle to sqr
so (4x + 40) + (2x-10) = 180 combine like terms
6x + 30 = 180 subtract out 30 to get x alone
6x = 150 divide by 6 to get x alone
x = 25
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