Wyznacz x i y z równania.
a) 3y-3x=4
b) 4x+2y=-8
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a)
3y – 3x = 4
3y = 3x + 4 /: 3
y = x + 4/3
-3x = - 3y + 4 /: (-3)
x = y - 4/3
b)
4x + 2y = - 8
2y = -4x - 8 / : 2
y = -2x - 4
4x + 2y = -8
4x = - 2y - 8 /: 4
x = - 1/2 y - 2
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a)
3y – 3x = 4
3y = 3x + 4 /: 3
y = x + 4/3
3y – 3x = 4
-3x = - 3y + 4 /: (-3)
x = y - 4/3
b)
4x + 2y = - 8
2y = -4x - 8 / : 2
y = -2x - 4
4x + 2y = -8
4x = - 2y - 8 /: 4
x = - 1/2 y - 2