Question

Determine o valor de X e de Y:
2x-3y=11
2x+7y=1

Answer 1

2x=11+3y

x=11+3y
2

2(11+3y)+7y=1
2

11+3y+7y=1

10y=1-11

y=-10
10

y=-1

2x-3.-1=11

2x+3=11

2x=11-3

x=8
2

x = 4



X=4 Y=-1