Himpunan penyelesaian dari 2x + 3 (y-5) = 4 dan 3 x + 7 (y-5)=-4

2x+3(y-5)=4
3x+7(y-5)=-4

=>2x+3(y-5)=4
2x+3y-15=4
2x+3y=4+15
2x+3y=19
=>3x+7(y-5)=-4
3x+7y-35=-4
3x+7y=-4+35
3x+7y=31

=>2x+3y=19. x3
3x+7y=31. x2
=>6x+9y=57
6x+14y=62
__________ _
-5y=-5
y=-5/-5=1
2x+3(1)=19
2x+3=19
2x=19-3
2x=16
x=16/2=8

jadi x=8
y=1

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