Question

7 . (3x + 4) = 81

Slv Slv,
ajudem mn​

Answer 1

Resposta:

x=53/21

Explicação passo-a-passo:

7(3x+4)/7=81/7

3x+4=81/7

3x=81/7 -4

3x=81/7 -4⋅ 7/7

3x=81/7 + -4⋅7/7

3x=81-4⋅7/7

3x=81-28/7

3x=53/7

3x/3=53/7 ⋅ 1/3

x=53/7 ⋅ 1/3

x=53/7⋅3

x=53/21