Question

1) resolva as equações do 1° grau
A) 6 × - 22 = 4 × + 68

B) 5 × + 12 = 3 × + 36

C) 14 × + 120 = 10 × 260

D) 8 × - 140 = 4 × + 280

Answer 1

Resposta:

1 a ) 6 × - 22 = 4 × + 68

2x=90

x=45

B) 5 × + 12 = 3 × + 36

2x=36-12

2x=24

x=12

C) 14 × + 120 = 10 × 260

4x=140

2x=70

x=35

D) 8 × - 140 = 4 × + 280

4x=280+140

4x=420

2x=210

x=105

Answer 2

Resposta:

a) x = 45

b) x = 12

c) x = 35

d) x = 105

Explicação passo-a-passo:

a) 6x - 22 = 4x + 68

6x - 4x = 68 + 22

2x = 90

x = 90 ÷ 2

x = 45

b) 5x + 12 = 3x + 36

5x - 3x = 36 - 12

2x = 24

x = 24 ÷ 2

x = 12

c) 14x + 120 = 10x + 260

14x - 10x = 260 - 120

4x = 140

x = 140 ÷ 4

x = 35

d) 8x - 140 = 4x + 280

8x - 4x = 280 + 140

4x = 420

x = 420 ÷ 4

x = 105