Rozwiązanie układu równań:
4=-6a+b
-6=2a+b
a=?
b=?
4+6a=b
-6=2a+4+6a
-6-4=8a
-10=8a /:8
a=-10/8
a=-1 2/8
a=-1,25
4+6*(-1,25)=b
4+(-7,5)=b
b=-3,5
spr.
4=-6*(-1,25)+(-,5)
4=7,5-3,5
4=4
-6=2*(-1,25)+(-3,5)
-6=-2,5-3,5
-6=-6
4 = -6a + b
-6 = 2a + b
b = 4 + 6a
-6 = 2a + 4 + 6a
2a + 6a = -6 - 4
8a = -10 /:8
a = - 5/4
b = 4 + 6 * (- 5/4)
b = 4 + (- 15/2)
b = - 3 1/2
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4=-6a+b
-6=2a+b
4+6a=b
-6=2a+4+6a
-6-4=8a
-10=8a /:8
a=-10/8
a=-1 2/8
a=-1,25
4+6*(-1,25)=b
4+(-7,5)=b
b=-3,5
spr.
4=-6*(-1,25)+(-,5)
4=7,5-3,5
4=4
-6=2*(-1,25)+(-3,5)
-6=-2,5-3,5
-6=-6
4 = -6a + b
-6 = 2a + b
b = 4 + 6a
-6 = 2a + 4 + 6a
b = 4 + 6a
2a + 6a = -6 - 4
b = 4 + 6a
8a = -10 /:8
b = 4 + 6a
a = - 5/4
b = 4 + 6 * (- 5/4)
a = - 5/4
b = 4 + (- 15/2)
a = - 5/4
b = - 3 1/2
a = - 5/4