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y=2x-5
y=2(y+2)-5
y=2y+4-5
y-2y=-1
y = 1
mencari x,
1=2x-5
1+5 = 2x
6 = 2x
x = 3
HP : ({3,1)}
2. 4x+3y=56
2x-y=3
y=2x-3
jdi, 4x+3(2x-3) = 56
4x+6x-9 = 56
10x = 56+9
10x = 65
x = 6,5
mencari y,
4(6,5)+3y = 56
26+3y = 56
3y = 56-26
3y = 30
y = 10
HP : {(6 1/2,10)}
2x-y. = 3 |x4|8x-4y=12
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10y=100
y=10