Odpowiedź:
Szczegółowe wyjaśnienie:
1)
(x+2)/4 - (x-1)/8 = 2 / *8
2*(x+2) - x +1 = 16
2x+4-x+1 = 16
x = 16-5
x = 11
2)
(3x-5)/2 - (5x-1)/10 = 0 / *10
5*(3x-5) - 5x + 1 = 0
15x-25-5x+1= 0
10x = 24 /: 10
x = 24/10 = 12/5 = 2 2/5
3)
(x+3)(x+2)-x² = 0
x²+2x+3x+6-x² = 0
5x = -6 /:5
x = -6/5
4)
1/5 *(x-3) = 9 - x / *5
x -3 = 45- 5x
x + 5x = 45 + 3
6x = 48 / :6
x = 8
5)
(x-3)(4x+2) = 4x²+3
4x²+2x-12x-6 = 4x²+3
4x²-10x-4x² = 3+6
-10x = 9 /:(-10)
x = -9/10
