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2x = 3 = 7
4 - 3x = (-5)
4 = 5 - x = (-7)
3x - 6 = (-12)
10 = 4 - 2x
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2x + 3 = 7
2x = 7 - 3
2x = 4
x = 4 : 2
x = 2
spr
2x + 3 = 2 * 2 + 3 = 4 + 3 = 7
4 - 3x = (-5)
-3x = -5 - 4
-3x = -9
x = -9 : (-3)
x = 3
spr
4 - 3x = 4 - 3*3 = 4 - 9 = -5
4 = 5 - x = (-7)
który znak "=" to plus?
3x - 6 = (-12)
3x = -12 + 6
3x = -6
x = -2
spr
3x - 6 = 3 *(-2) - 6 = -6 - 6 = -12
10 = 4 - 2x
2x = 4 - 10
2x = -6
x = -3
spr
4 - 2x = 4 - 2 * (-3) = 4 + 6 = 10
załącznik.