Question

Por favor me ajudem
foto:

Answer 1

a) 3x+20°= 4x-20°
3x-4x= -20°-20°
-x= -40°(-1)
x= 40°

3x+20°=
3(40°)+20°= 120°+20°= 140°
4x-20°=
4(40°)-20°= 160°-20°= 140°

b) x/3 + x/2 = x/2+140°
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2x+3x= 3x + 840°
2x+3x-3x= 840°
2x=840°
x= 840° ÷2
x= 420°

x/3 +x/2= 420°÷3 + 420°÷2= 140°+210° = 350°
x/2+140°=
420°÷2 + 140°= 210°+140°= 350°