Question

ME AJUDEM POR FAVOR!!

a) 6x+4=16x-20
b)7x+9=-8x+15
c) 25x-17=-5x+18
d) 31x-20=14x+7
e) 6 (4x+5) = 17x+9
f) 7 (2x-3)= 20x-4
g) 18 (x+3) = 4 ( 2x+16)​

Answer 1

Resposta:

a)x=2,4

b)x=0,4

c)x=1,16

d)x=1,58

e)x=-3

f)x=-2,83

g)x=1

Explicação passo-a-passo:

a)6x+4=16x-20

6x+4-16x+20=0

-10x+24=0

-10x=-24

x=24/10

x=2,4

b)7x+9=-8x+15

7x+9+8x-15=0

15x-6=0

15x=6

x=6/15

x=0,4

c)25x-17=-5x+18

25x-17+5x-18=0

30x-35=0

30x=35

x=35/30

x=1,16

d)31x-20=14x+7

31x-20-14x-7=0

17x-27=0

17x=27

x=27/17

x=1,58

e)6.(4x+5)=17x+9

24x+30=17x+9

24x+30-17x-9=0

7x+21=0

7x=-21

x=-21/7

x=-3

f)7.(2x-3)=20x-4

14x-21=20x-4

14x-21-20x+4=0

-6x-17=0

-6x=17

x=-17/6

x=-2,83

g)18(x+3)=4.(2x+16)

18x+54=8x+64

18x+54-8x-64=0

10x-10=0

10x=10

x=10/10

x=1