Tolong jawab pake cara buat besok No 16

2x + 40 = 130
2x = 130 - 40
2x = 90
x = 45

y + 10 = 40
y = 40 - 10
y = 30

3z + 20 = 80
3z = 80 - 20
3z = 60
z = 20

x + y - z = 45 + 30 - 20
= 75 - 20 = 55 (c)

maaf kalau salah...

2x + 40 = 130
2x = 90
x = 45

y + 10 = 40
y = 40 - 10 = 30


3z + 20 = 80
3z = 80 - 20
3z = 60
z = 20



jadi x + y - z
=45 + 30 - 20
=75 - 20
=55