Question

ME AJUDEM POR FAVOR
35 PONTOS

Answer 1

15)

x + (180 - (2x+20)) + (180-(4x+10)) = 180
x + 160-2x + 170-4x = 180
330-5x = 180
-5x = 180-330
-5x = -150
x = -150 / -5
x = 30

16)

2x+30 = 2x-30 + x + 10
2x+30 = 3x -20
30+20 = 3x-2x
50 = x

2x+30 + y = 180
2(50) + 30 + y = 180
130 + y = 180
y = 180 - 130
y = 50

x-y = 50 - 50 = 0