Question

EQUAÇÕES EE 1 GRAU
A)3X+10=2×+16 d)3x+5=2x-10 g)5x=24 K)3X-8=X+12
B)5x-2=4x-15 e)7x+6=5x+10+X H)3X+1=22 J)5X+2=2X+23
C)3x+2=2x-5 f)3X=21 I) 5X-2=3X+10

Answer 1

Resposta:

A)x=6

B)x=-13

c)x=-7

d)x=-15

e)x=4

f)x=7

g)x=24/5

h)x=7

i)x=6

j)x=7

k)x=10

Explicação passo a passo:

a) 3x+10=2x+16

3x-2x=16-10

1x=6

x=6. (vale lembrar que 1x e x são a mesma coisa)

b)5x-2=4x-15

5x-4x=-15+2

x=-13

c)3x+2=2x-5

3x-2x=-5-2

x=-7

d)3x+5=2x-10

3x-2x=-10-5

x=-15

e)7x+6=5x+10+X

7x-5x-1x=10-6

x=4

f)3X=21

3x=21

x=21/3

x=7

g)5x=24

x=24/5 (24 sobre 5, fração irredutível)

h)3X+1=22

3x=21

x=21/3

x=7

I) 5x-2=3x+10

5x-3x=10+2

2x=12

x=12/2

x=6

j)5x+2=2x+23

5x-2x=23-2

3x=21

x=21/3

x=7

k)3X-8=X+12

3x-1x=12+8

2x=20

x=20/2

x=10