Which value of x is the solution of the equation

Question

1/7 + 2x/3 = (15x-3)/(21) ?
(Those are fractions)

(1) 6
(2) 0
(3) 4/13
(4) 6/29

Answer 1

way 1: try each answer and get (1)

way 2: solve algebraically

1/7 + 2x/3 = (15x-3)/(21)
3 + 14x = 15x-3
x = 6

Answer 2

Thanks! I just did, makes sense!