2x+5y=2
X+3y=1
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2x+5y=13
x=1+3y
2(1+3y)+5y=13
2+6y+5y=13
11y=11
y=1
x=1+3(1)
x=1+3
x=4
2) 2x+y=10
x+3y=15
x=15-3y
2(15-3y)+y=10
30-6y+y=10
-5y=-20
y=4
x=15-3(4)
x=15-12
x=3
3) 3x+y=13
2x-y=12
y=13-3x
2x-(13-3x)=12
2x-13+3x=12
5x=25
x=5
y=13-3(5)
y=13-15
y=-2
R) 1) x=4 ; y=1 | 2) x=3 ; y=4 | 3) x=5 ; y=-2
x=1+3y
2(1+3y)+5y=13
2+6y+5y=13
11y=11
y=1
x=1+3(1)
x=1+3
x=4
2) 2x+y=10
x+3y=15
x=15-3y
2(15-3y)+y=10
30-6y+y=10
-5y=-20
y=4
x=15-3(4)
x=15-12
x=3
3) 3x+y=13
2x-y=12
y=13-3x
2x-(13-3x)=12
2x-13+3x=12
5x=25
x=5
y=13-3(5)
y=13-15
y=-2
R) 1) x=4 ; y=1 | 2) x=3 ; y=4 | 3) x=5 ; y=-2
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