Odpowiedź:
a) 6x + 2 = 6
6x = 4
x = 4/6 = 2/3
23 + x = 23 2/3
c) 2x - 8 = 5x - 6
0 = 3x + 2
3x = -2
x = -2/3
d) 3x(x - 6) = x(3x + 4) + 6
3x² - 18x = 3x² + 4x + 6
-18x = 4x + 6
-6 = 22x
x = -6/22 = -3/11
3x - 95 = 3 + x
2x = 98
x = 49
h) 2x + 25 3/4 = 16x - 5(6,4x - 4 1/4)
25 3/4 = 14x - 32x + 20 5/4 |-21
4 3/4 = -18x + 1/4
18x = 1/4 - 4 3/4
18x = - 4 1/2
18x = - 9/2 |÷9
2x = - 1/2 |÷2
x = - 1/4
i) 3(2x - 1) - 4(4x - 2) = 0
3(2x - 1) - 4×2(2x - 1) = 0
(2x - 1)×(3-8) = 0
2x - 1 = 0
2x = 1
x = 1/2
j) 4(x - 3) - 2(3x - 9) = 0
4(x - 3) - 2×3(x - 3) = 0
(x-3)×(4 - 6) = 0
x - 3 = 0
x = 3
