Question

Rozwiąż równania:
a) 2x – 1 = 7
b) 2x – 5 = -45 – 3x
c) 2x + 6 = -2x +4
d)-8x+2=18
e)-4x-2=6
f) 5x+1=3x-4
g)8x+1=4x-15
h)12x=-24

Answer 1

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 = -

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 = - = -1

g) 8x+1=4x-15

8x-4x = -15-1

4x = -16 /4

x = -4

h) 12x=-24 / 12

x = -2