Question

1.resolva as equações do 1 grau.

A)3×-13=8

B 7×-33=-12

C) 33+×=-12-3×

Como fazer essas contas do 1 grau?


Resposta:

Answer 1

Resposta:

A)x=7

B)x=3

C)x=- 45/4

Explicação passo-a-passo:

A)3x-13=8

3x-13=8

3x÷13+13=8+13

3x=8+13

3x-13=8

3x=8+13

3x=21

3x÷3=21÷3

x=21÷3

3x÷3=21÷3

x=7

3x=21

x=7

Resposta

x=7

B)7x-33=-12

7x-33=-12

3x-33+33=-12+33

7x=-12+33

7x-33=-12

7x=-12+33

-12+33

+(33-12)

21

7x=-12+33

7x=21

7x÷7=21÷7

x=21÷7

7x÷7=21÷7

x=3

7x=21

x=3

Resposta

x=3

C)33+x=-12-3x

33+x=-12-3x

33+x+3x=-12-3x+3x

33+x+3x=-12

33+x=-12-3x

33+x+3x=-12

33+x=-12-3x

33+x+3x-33=-12-33

x+3x=-12-33

33+x=-12-33

x+3x

1x+3x

(1+3)x

4x

x+3x=-12-33

4x=-12-33

x+3x=-12-33

-12-33

-(12+33)

-45

x+3x=-12-33

4x=-45

4x÷4=-45÷4

x=45÷4

4x÷4=-45÷4

x=-45÷4

4x=-45/4

Resposta

x=-45/4