Respuesta :

uwayo

Answer:

7

Step-by-step explanation:

collect like terms

14=-a+3a

2a=14

dividing both sides

a=7

Answer:

A=7

Step-by-step explanation:

You wanna add the -3a into the other -a but you'd be adding that -3a. You would end up getting 14=2a,then you would divide that 2 into itself and the 14 giving you a=7