Question

me ajuda pfv help
a) x +5 = 20 - 4x
b) 18 x -43= 65
c) 23 X -16=14 - 17x
d) 4x -1=3 (x-1)
e) 3 (x-2) = 2x - 4
f) 3 X + 4= 2 (x-1)
g) 5 ( x - 2)=3 (x+ 2)
h) 4( x + 5) -21 = 3 (x+5)
i) 3( 3 x -1)=2 ( 2x + 2)

15 pts

Answer 1

x +5 = 20 - 4x

x + 4x = 20 - 5

3x = 15

X= 15/3

X= 5

4( x + 5) -21 = 3 (x+5)

4x+20-21=3x+15

4x-3x=15-20+21

X= -5+21

X=16

i) 3( 3 x -1)=2 ( 2x + 2)

9x-3=4x+4

9x-4x=4+3

5x=7

X=7/5

Answer 2

a) x +5 = 20 - 4x
x + 4x = 20 - 5
5x = 15
x = 15/5
x = 3

b) 18x - 43= 65
18x = 65 + 43
18x = 108
x = 108/18
x = 6

c) 23x -16=14 - 17x
23x + 17x = 14 + 16
40x = 30
x = 30/40 (÷10)
x= 3/4

d) 4x -1=3 (x-1)
4x - 1 = 3x - 3
4x - 3x = - 3 + 1
x = - 2

e) 3 (x-2) = 2x - 4
3x - 6 = 2x - 4
3x - 2x = - 4 + 6
x = 2

f) 3x + 4= 2 (x-1)
3x + 4 = 2x - 2
3x - 2x = - 2 - 4
x = - 6

g) 5 ( x - 2)=3 (x+ 2)
5x - 10 = 3x + 6
5x - 3x = 6 + 10
2x = 16
x = 16/2
x = 8

h) 4( x + 5) -21 = 3 (x+5)
4x + 20 - 21 = 3x + 15
4x - 3x = 15 - 20 + 21
x = 16

i) 3( 3x -1)=2 ( 2x + 2)
9x - 3 = 4x + 4
9x - 4x = 4 + 3
5x = 7
x = 7/5