x+5y=0
3x+7y-16=0
x+5y=0
x=-5y
3(-5y)+7y-16=0
-15y+7y-16=0
-8y-16=0
-8y=16
y=2 x=2(-5)=-10
x-2y=0
2x-3y-7=0
x-2y=0
x=2y
2•2y-3y-7=0
4y-3y=7
y=7 x=2•7=14
y-3x=0
x-2y+10=0
y-3x=0
y=3x
x-2•3x+10=0
x-6x=-10
-5x=-10
x=2
y=3•2=6
դ)7x-y=0
3x-y12=0
7x-y=0
y=7x
3x-7x+12=0
-4x=-12
x=3
y=21
32
5x + y – 7 = 0
x – 3y – 11 = 0
y = 7 – 5x
x – 3(7-5x) – 11 = 0
x – 21 + 15x – 11 = 0
16x = 32
x = 32/16 = 2
y = 7 – 10 = -3
2x+y-1=0
3x+2y+5=0
2x+y-1=0
y=1-2x
3x+2(1-2x)+5=0
3x+2-4x+5=0
3x-4x+7=0
x=7 y=1-14=-13
2x+y-7=0
x-2y+4=0
y=7-2x
x-2(7-2x)+4=0
x-14+4x+4=0
5x=10
x=2
y=7-2x=7-4=3
y=3
3x+y+5=0
x-3y-5=0
x-3y-5=0
x=3y+5
3(3y+5)+y+5=0
9y+15+y+5=0
10y+20=0
y=-2
x=3(-2)+5=-1
x+2y-4=0
3x+y+3=0
x+2y-4=0
x=4-2y
3(4-2y)+y+3=0
12-6y+y+3=0
-5y=-15
y=3
x=4-2y=4-6=-2
5x+y-15=0
x-2y-14=0
5x+y-15=0
y=15-5x
x-2(15-5x)-14=0
x-30+10x-14=0
11x=44
x=4
y=15-5x=15-20=-5
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