30
x+5y=0
3x+7y-16=0
x+5y=0
x=-5y
3x-5y+7y-16=0
15y+7y-16=0
-8y-16=0
-8=16
-y=2
-1x[-y]=-1×2
y=2
x=-5[-2]
x=10
բ]x-y-2=0
x+y-6=0
x=y+2
y+2+y-6=0
2y+2-6=0
2y=4
y=2
x=2+2
x=4
32
1]
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
(2; -3)
y=5x+7
x-3X[5x+7]-11=0
x-15x+21-11=0
2]2x+y-1=0
3x+2y+5=0
y=2x+1
3x+2X[2x+1]+5=0
3x+4x+2+5=0
7x=7
x=1
3]2x+y-7=0
x-2y+4=0
y=2x+7
x-2X[2x+7]+4=0
x-4x+14+4=0
3x=18
x=6
y=2X6+7
y=19
4]x+2y-15=0
3x+y+3=0
x=2y+15
3X[2y+15]+y+3=0
5y+45+y+3=0
6y=42
y=7
x=2X7+15
x=29
5]3x+y+5=0
x-3y-5=0
y=3x-5
x-3X[3x-5]-5=0
x-9x-15-5=0
-8x=20
8x=-20
33
1]2x-3y+7=0
x-2y-14=0
2x=3y+7
3y+7-2y-14=0
5y=20
y=4
2x=3×4+7
2x=29
x=14,5
y=3
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