Question

Resolva as equações a seguir:

a)18x - 43 = 65

b) 23x - 16 = 14 - 17x

c) 10y - 5 (1 + y) = 3 (2y - 2) – 20

d) x+30 = 40?

e) 30-20+2x=10?

f) 3x-10+13=-2x+28?

g) -5x+45-89=-90+41?

h)10x-20=40+50?

i) 20-80+2x=10?

j)19+2x-13=10-20? ​

Answer 1

Explicação passo-a-passo:

a)

18x - 43 = 65

18x=65+43

18x=108

x=108/18

x=6

b)

23x - 16 = 14 - 17x

23x+17x=14+16

40x=30

x=30/40 *simplificando por 10*

x=3/4

c)

10y - 5 (1 + y) = 3 (2y - 2) – 20

10y-5-5y=6y-6-20

10y-5y-6y=-6-20+5

10y-11y=-26+5

-y=-21 (*-)

y=21

d)

x+30 = 40

x=40-30

x=10

e)

30-20+2x=10

2x=10-30+20

2x=-20+20

2x=0

x=0

f)

3x-10+13=-2x+28

3x+2x=28+10-13

5x=38-13

5x=25

x=25/5

x=5

g)

-5x+45-89=-90+41

-5x=-90+41-45+89

-5x=-49-45+89

-5x=-94+89

-5x=-5 (*-)

5x=5

x=5/5

x=1

h)

10x-20=40+50

10x=40+50+20

10x=90+20

10x=110

x=110/10

x=11

i)

20-80+2x=10

2x=10-20+80

2x=-10+80

2x=70

x=70/2

x=35

j)

19+2x-13=10-20

2x=10-20-19+13

2x=-10-19+13

2x=-29+13

2x=-16

x=-16/2

x=-8

Espero ter te ajudado S2