Question

) Calcule o valor de x: a) x + 6 = 20 b) x - 6 = 15 c) 3.x = 18 d) 4.x + 9 = x + 6 *​

Answer 1

Resposta:

a) x = 14 b) x = 21 c) x = 6 d) x = -1

Explicação passo a passo:

a) x + 6 = 20 -> x = 20 - 6 -> x = 14

b) x - 6 = 15 -> x = 15 + 6 -> x = 21

c) 3x = 18 -> x = 18/3 -> x = 6

d) 4x + 9 = x + 6 -> 4x - x = - 9 + 6 -> 3x = - 3 -> x = -1

Espero ter ajudado :))