Question

e guacão do 1 grau


mim ajuda pofavor pessoal​

Answer 1

Resposta:

1) 15; 2) 11; 3) 3/2; 4) -15/2; 5) Sim; 6) 4.

Explicação passo a passo:

1) x + 10 = 25

x = 25 - 10

x = 15.

2) 4x - 15 = 2x + 7

4x - 2x = 7 + 15

2x = 22

x = 22 : 2

x = 11.

3) 2(2x - 5) + 3(x + 4) = 5(x - 1) + 10

4x - 10 + 3x + 12 = 5x - 5 + 10

4x + 3x - 5x = - 5 + 10 + 10 - 12

7x - 5x = 5 - 2

2x = 3

x = 3/2.

4) 4(x - 5) + 10 = 5(7 + 2x)

4x - 20 + 10 = 35 + 10x

4x - 10x = 35 + 20 - 10

- 6x = 55 - 10

- 6x = 45  .(-1)

6x = - 45

x = -45/6

x = - 15/2.

5) y - 10 = 25.

v = 25 + 10

y = 35.

6) 2x + 3 + 4x - 7 + 2x + 3 + 4x - 7 = 40

2x + 4x + 2x + 4x = 40 - 3 + 7 - 3 + 7

6x + 6x = 40 + 4 + 4

12x = 48

x = 48 : 12

x = 4.