Odpowiedź:
a) 3x + 7 = 2x + 1 /-2x
x + 7 = 1 /-7
x = -6
b) x = 8 - 3x /+3x
4x = 8 /:4
x = 2
c) 2x - 4 = 4x - 2 /-4x
-2x - 4 = -2 /+4
-2x = 2 /:(-2)
x = -2
d) 7 - 2x = 5x + 28 /-5x
7 - 7x = 28 /-7
-7x = 21 /:(-7)
x = -3
e) 8x - 5 = 9x - 5 /-9x
-x - 5 = -5 /+5
-x = 0
x = 0
f) 6x + 2x - 10 = 3x + 5
8x - 10 = 3x + 5 /-3x
5x - 10 = 5 /+10
5x = 15 /:5
x = 3
g) 4x - 1 + 5x = 6x +1 - 7x
9x - 1 = -x + 1 /+x
10x - 1 = 1 /+1
10x = 2 /:10
x = 0,2
h) x - 5 + 3x = 6 - 2x + 7
4x - 5 = 13 - 2x /+2x
6x - 5 = 13 /+5
6x = 18 /:6
x = 3
