Question

Plz solve these questions​

Answer 1

answer of which question..?

Answer 2

I know 4th ans

$(7x + 20) + (3x) = 180$

(complementary angles)

$10x + 20 = 180 \\ 10x = 180 - 20 \\ 10x = 160 \\ x = \frac{160}{10} \\ x = 16 \\ 7x + 20 = 132 \\ 3x = 48$

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