Resposta:

a) 5 x - 12 = 3

Let's solve your equation step-by-step.

5x−12=3

Step 1: Add 12 to both sides.

5x−12+12=3+12

5x=15

Step 2: Divide both sides by 5.

5x/5=15/5

x=3

Answer:

x=3

Explicação passo a passo: