Odpowiedź:
1.
4x + 6 = 38
4x = 38 - 6 /:4
x = 32/4 = 8
2.
62 - x = 21
-x = 21 - 62 /*(-1)
x = -41 * (-1) = 41
3.
5x - 7 - x = 21
4x = 21 + 7 /:4
x = 28/4 = 7
4.
21 = 9x - 5x - 11
4x = 21 + 11 /:4
x = 32/4 = 8
5.
8 - 6x + 11 = 12x + 5 - 7x
-6x - 5x = 5 - 11
-11x = -6 /:(-11)
x = 6/11
6.
14x + 7x - 11 = 6 + 13x + 1
21x - 13x = 7 + 11
8x = 18 /:8
x = 18/8 = 2 2/8 = 2 1/4
7.
4 - 8x - 16 = 9x + 8 - 7x
-8x - 2x = 8 + 12
-10x = 20 /:(-10)
x = 2
8.
1 + 6x - 17x - 8 = 5x - 2 - 4x + 3
-11x - x = 1 + 7
-12x = 8 /:(-12)
x = -8/12 = -2/3
Szczegółowe wyjaśnienie:
