Question

(x-20)° & ( x+10)° are two complementary angles. Find the value of x
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Answer 1

Answer:

(x-20)+(x+10)=90  (compelmentary angles add up to 90)

x-20+x+10=90

x+x-20+10=90

2x-10=90

2x=100

x=50

Answer 2

Answer:

50°

Step-by-step explanation:

x-20+x+10= 90° (complementary angle)

2x-10=90°

2x=100

x= 50°

therefore

x-20= 50-20 = 30°

x+10= 50+10 = 60°

P.S. (angles add up to 180° are called supplementary angles)