Respuesta :

Answer:

Your answer is b

Step-by-step explanation:

Here you go mate

Step 1

21=14+7x  Equation/Question

Step 2

21=14+7x  Simplify

21=14+7x

Step 3

21=14+7x  Subtract 14x

7x=7

Step 4

7x=7  Divide by 7

answer

1

Hope this help