Odpowiedź:
a) 2x – 1 = 7
2x = 7+1
2x = 8 /2
x = 4
b) 2x – 5 = -45 – 3x
2x+3x = -45+5
5x = -40 /5
x = -8
c) 2x + 6 = -2x +4
2x+2x = 4-6
4x = -2 /4
x = -[tex]\frac{1}{2}[/tex]
d) -8x+2=18
-8x = 18-2
-8x = 16 /(-8)
x = -2
e) -4x-2=6
-4x = 6+2
-4x = 8 /(-4)
x = -2
f) 5x+1=3x-4
5x-3x = -4-1
2x = -5 /2
x = -[tex]\frac{5}{2}[/tex] = -1 [tex]\frac{1}{2}[/tex]
g) 8x+1=4x-15
8x-4x = -15-1
4x = -16 /4
x = -4
h) 12x=-24 / 12
x = -2
