Question

alguém me ajuda, porrr favorr
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Answer 1

Explicação passo-a-passo:

a)

5x+20+5x+10= 180°

10x+30= 180

10x= 180-30

10x=150

x= 150/10

x= 15°

5x+20= 5•15+20=75 +20= = 95°

5x+10= 5•15+10= 85°

b) 5x+3x+12= 180°

8x= 180-12

8x= 168

x=168/8

x= 21°

5x= 5•21= 105°

3x+12= 3•21+12= 63+12= 75°

c)

x/2+120=180°

x/2=180-120

x/2=60

x=60•2

x= 120°

x/2= 120/2= 60°

d)

5x+40+2x+10=180°

5x+2x=180-40-10

7x=180-50

7x= 130

x=130/7

x≈18,6°