Question

Va rog sa ma ajutati si pe mine la mate !!! va rog

Answer 1

a) 3x-3 = x+7

3x - x = 7+3

2x = 10

x = 5

b) 2x+6-5 = x-7

2x-x = -7-1

x = -8

c) 4x+32 = 3x-6

x = -38

d) 1,4x-3,4x = 5/8 -4

-2x = (5-32)/8

-2x = -27/8

x = 27/16

e) 5x-3x+3 = 4-x

2x+x = 4-3

3x = 1

x = 1/3

f) 1/2 x - 3/8 + 5 = 7/2

1/2 x - 37/8 = 7/2 |*8

4x + 37 = 28

4x = -9

x = -9/4

g) 7/3 x - 7/2 = x + 13/6

14x - 21 = 6x + 13

14x - 6x = 13 + 21

8x = 34

x = 34/8 = 17/4

h) 25x - 6 = 25

25x = 25 + 6

25x = 31

x = 31/25

Answer 2

a)3(x-1)=x+7

3x-3=x+7

3x-x-3=7

3x-x=7+3

2x=7+3=10

2x:2=10:2

x=10:2=5

b)2(x+3)-5=x-7

2x+6-5=x-7

2x+1=x-7

2x-x+1=-7

2x-x=-7-1

x=-7-1=-8

c)4(x+8)=3(x-2)

4x+32=3x-6

4x-3x+32=-6

4x-3x=-6-32

x=-6-32=-38

e)5x-3(x-1)=4-x

5x-3x+3=4-x

2x+3=4-x

2x+x+3=4

2x+x=4-3

3x=4-3=1

3x:3=1:3

$x = 1 : 3 = \frac{1}{3}$