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2x-y=1
2x+5y=2
-y=1-2x/:(-1)
2x+5y=2
y=-1+2x
2x+5(-1+2x)=2
y=-1+2x
2x-5+10x=2
y=-1+2x
2x+10x=2+5
y=-1+2x
12x=7/:12
y=-1+2x
x=⁷/₁₂
y=-1+2(⁷/₁₂)
x=⁷/₁₂
y=-1+1⅙
x=⁷/₁₂
y=⅙
3(x+y)+2y=3
3(2x-y)-4(1-x)=3y-1
3x+3y+2y=3
6x-3y-4+4x=3y-1
3x+5y=3
10x-6y=4
3x=3-5y/:3
10x-6y=4
x=1-⁵/₃y
10(1-⁵/₃y)-6y=4
x=1-⁵/₃y
10-16²/₃y-6y=4
x=1-⁵/₃y
-22⅔y=-6/:(-22⅔)
x=1-⁵/₃y
y=⁹/₃₄
x=1-⁵/₃(⁹/₃₄)
y=⁹/₃₄
x=1-¹⁵/₃₄
y=⁹/₃₄
x=¹⁹/₃₄
y=⁹/₃₄