Question

равнения.
f) 5 - 2х + 4х = 21
g) 2 (х - 8) = 20
h ) 3 (x - 8) = 2х - 4 i) 3х - 2 = 14 - 5x
j)8 (х + 2) = 5(х + 2) + 15
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Answer 1

f) 5 - 2х + 4х = 21

5 + 2x = 21

2x= 21 - 5

2x= 16

x= 16/2

x= 8

g) 2 (х - 8) = 20

2x - 16 = 20

2x= 20 + 16

2x= 36

x= 36/2

x= 18

h ) 3 (x - 8) = 2х - 4

3x - 24 = 2x - 4

3x - 2x = - 4 + 24

x= 20

i) 3х - 2 = 14 - 5x

3x + 5x = 14 + 2

8x= 16

x= 16/8

x= 2

j)8 (х + 2) = 5(х + 2) + 15

8x + 16 = 5x + 10 + 15

8x + 16 = 5x + 25

8x - 5x = 25 - 16

3x= 9

x= 9/3

x= 3