Question

PFV ME AJUDA É PRA HOJE

×+y=60
×-y=20





×+y=10
×-y=30




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Answer 1

2x = 60+20
2x = 80
x = 40

x - y = 30
20 - y = 30
- y = 30 -40
- y = -20
y = -20 (-1)
y = 20

S= (40, 20)


2x = 30 +10
2x = 40
x = 40/2
x = 20

x+y = 10
20 +y = 10
y = 10 -20
y= -10

S = (20, -10)