Question

4x+y=13,90
2x+y=7,50

Answer 1

Ola Marquinhos

4x + y = 13.90
2x + y = 7.50

2x = 6.40
x = 3.20 

6.40 + y = 7.50
y = 7.50 - 6.40 = 1.10

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Answer 2

4x+y= 13,90
2x+ y = 7,50

2x= 6.40
x= 3,20

6,40 + y = 7,50
y = 7,50 -6,40
y = 1,10