1) która z liczb: 5, -5, 6, -1 jest rozwiązaniem równania
2)rozwiąż równanie
a)
b)
1.
5x - 7 = 0 (x + 11) - 2 ( 1-3x)
5x - 7 = -2 + 6x
x = 5
2.
a)5x + 5 - 4x + 6 + 4x = -x + 5
6x = -6
x = -1
b) x² + 4x + 4 - x² - 9 = 6x + 24 - 15
-2x = 4
x = -7
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1.
5x - 7 = 0 (x + 11) - 2 ( 1-3x)
5x - 7 = -2 + 6x
x = 5
2.
a)5x + 5 - 4x + 6 + 4x = -x + 5
6x = -6
x = -1
b) x² + 4x + 4 - x² - 9 = 6x + 24 - 15
-2x = 4
x = -7