Question

Resolva as seguintes equações (com contas):

A) 9x-2=4x+18

B) 9x-18+3x=10

C) 7x+1=5x-7

D) 2 (x+5) - 4 = 26

E) 3 (x+2) = 2 (x-7)

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

G) 3 (2x-3) + x = 5

H) 2x -10 + 7x +10 = 180

I) 2x+5+x+7 = 18

J)5 (2x-1) = 3 (x+10)

Answer 1

Resposta:

a)x=4

b)x=7/3

c)x=-4

d)x=10

e)x=-20

f)x=-2

g)x=2

h)x=20

i)x=2

j)x=25/7

Explicação passo-a-passo:

a)9x-2=4x+18

9x-4x=18+2

5x=20

x=20/5

x=4

b)9x-18+3x=10

9x+3x=10+18

12x=28

x=28/12

x=7/3

c)7x+1=5x-7

7x-5x=-7-1

2x=-8

x=-8/2

x=-4

d)2(x+5)-4=26

2x+10-4=26

2x=26-6

2x=20

x=20/2

x=10

e)3(x+2)=2(x-7)

3x+6=2x-14

x=20

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

3x+9-1=2

3x+8=2

3x=-6

x=-6/3

x=-2

g)3(2x-3)+x=5

6x+x=9+5

7x=14

x=14/7

x=2

h)2x-10+7x+10=180

2x+7x=180

9x=180

x=180/9

x=20

i)2x+5+x+7=18

3x=18-12

3x=6

x=6/3

x=2

j)10x-5=3x+30

7x=-5+30

x=25/7