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29.) (2x + 13) + (x + 20) = 90°
= 3x + 33 = 90°
3x = 57
x = 19
∠A = 2.19 + 13
= 38 + 13
= 51°
29) 2x + 13 + x +20 = 90
3x+ 33=90
3x = 57
x = 19
<A 2x + 13 = 2 x 19 + 13 = 38 + 13 = 51