Question

Resolva As Questões

a)n+2 (n+1)=104
b)2 (2x+3)+8=64
c)4x+4=3x+6
d)20x+(x+5)•50=950


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Answer 1

Resposta:

A) n = 34

B) x = 12,5

C) x = 2

D)  x = 10

Explicação passo-a-passo:

A) n + 2 · (n+1) = 104

n + 2n +2 = 104

3n +2 = 104

3n = 104 -2

3n = 102

n= 102÷3 = 34

B) 2 · (2x + 3) + 8 = 64

4x + 6 + 8 = 64

4x + 14 = 64

4x = 64 -14

4x = 50

x = 50 ÷ 4

x = 12,5

C) 4x + 4 = 3x + 6

4x - 3x = 6 - 4

x = 2

D) 20x + (x +5) · 50 = 950

20x + 50x + 250  = 950

70x = 950 - 250

70x = 700

x = 700÷ 70

x = 10