Rozwiąż układy równań metodą podstawiania .
3x - 4y = 6
-x + 2y = -2
y = 2/3 x
4x - 3y = 1
2x + 2y = 8
-x +3y = 8
-2a + 3b = 0
3a +0,5b = -5
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3x-4y=6
-x+2y=-2
3x-4y=6
-x=-2-2y/ :(-1)
3x-4y=6
x=2+2y
3(2+2y)-4y=6
x=2+2y
6+6y-4y=6
x=2+2y
2y=0
x=2+2y
y=0
x=2
__________
y=2/3x
4x-3y=1
y=2/3x
4x-3(2/3x)=1
y=2/3x
4x-2x=1
y=2/3x
2x=1/:2
y=2/3x
x=0,5
y=2/3*0,5
x=0,5
y=2/3*1/2
x=0,5
y=1/3
x=1/2
__________
2x+2y=8
-x+3y=8/:(-1)
2x+2y=8
x-3y=-8
x=3y-8
2(3y-8)+2y=8
x=3y-8
6y-16+2y=8
x=3y-8
8y=24/8
y=3
x=1
_________
-2a + 3b = 0
3a +0,5b = -5/:0,5
-2a+3b=0
6a+b=-10
-2a+3b=0
b=-10-6a
-2a+3(-10-6a)=0
b=-10-6a
-2a-30-18a=0
b=-10-6a
-20a=30/:(-20)
b=-10-6a
a=1,5
b=-10-9
a=1,5
b=-19