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(y=3x
(2x+y=5
2x+3x=5
x=1
y=3
2)
(x=2+y
(x-3y=4
2+y-3y=4
-2y=2
y=-1
x=1
2x+y=5
y=3x
2x+3x=5
y=3x
5x=5/÷5
y=3x x=1
y=3×1
x=1
y=3
x=1
x=2+y
x-3y=4
x=2+y
2+y-3y=4
x=2+y
2y=4-2
x=2+y
2y=2/÷2
x=2+y
y=1
x=2+1
y=1 x=3
y=1
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