Question

mă ajutati va rog!
a)3x - 1 = 8
b)3x - 6 = 2x + 1
c)2 • (4x - 1) = 14
d)4 • (2x - 1) = 2 • (x - 1) + x​

Answer 1

REZOLVARE :

a ) 3 x - 1 = 8

3x=9

x=9/3

x=3

b)

3x - 6 = 2x + 1 | + 6

3x= 2x + 7

x=7

c)

2 • (4x - 1) = 14

8x - 2 = 14

8x=16

x=16 : 8

x=2

d)

4 • (2x - 1) = 2 • (x - 1) + x​

8x - 4 = 2x-2 + x | -x

7x - 4 = 2x-2 | + 4

7x=2x + 2

5x=2

x=2 : 5

x= 0,4