Odpowiedź :
x=-3-y
4(-3-y)-3y=-26
-12-4y-3y=-26
-7y=-26+1-7y=-14:(-7)
y=2
x+2=-3
x=-5
4x-3y=-26
x+y=-3/*(-4)
4x-3y=-26
-4x-4y=12
-7y=-14:(-7)
y=2
x+2=-3
x=-5
4(-3-y)-3y=-26
-12-4y-3y=-26
-7y=-26+1-7y=-14:(-7)
y=2
x+2=-3
x=-5
4x-3y=-26
x+y=-3/*(-4)
4x-3y=-26
-4x-4y=12
-7y=-14:(-7)
y=2
x+2=-3
x=-5
1)
4x - 3y = -26
x + y = -3
4x - 3y = -26
x = -3-y
4(-3-y) - 3y = -26
x = -3-y
-12 - 4y - 3y = -26
x = -3-y
-7y = -14: (-7)
x = -3-y
y = 2
x = -3-2
y = 2
x = -5
2)
4x +3y = 10 *(-1)
3x + 4y = 11
-4x - 3y = -10
3x + 4y = 11
-7x - 7y = -21
-7(x + y) = -21 : (-7)
x + y = 3
x = 3 - y
4(3-y) + 3y = 10
12 - 4y + 3y = 10
-y = -2 :(-1)
y = 2
x = 3-2 = 1
4x - 3y = -26
x + y = -3
4x - 3y = -26
x = -3-y
4(-3-y) - 3y = -26
x = -3-y
-12 - 4y - 3y = -26
x = -3-y
-7y = -14: (-7)
x = -3-y
y = 2
x = -3-2
y = 2
x = -5
2)
4x +3y = 10 *(-1)
3x + 4y = 11
-4x - 3y = -10
3x + 4y = 11
-7x - 7y = -21
-7(x + y) = -21 : (-7)
x + y = 3
x = 3 - y
4(3-y) + 3y = 10
12 - 4y + 3y = 10
-y = -2 :(-1)
y = 2
x = 3-2 = 1