Question

Solve the equation using mental math.

Answer 1

x - 1/7 = 3 4/7
what is 1/7 + 4/7?

Answer 2

Cool. Let the brains duel it out!

Answer 3

(7x - 1) / 7 = 25/7

Now both side denominators are same which can be eliminated

7x - 1 = 25

7x = 26

x = 26/7

Answer 4

you don't need to do all of that ganibl

Answer 5

x - 1/7 = 3 (4/7)
x = 3(4/7) + 1/7
x = 3(5/7)
x = 26/7

Answer 6

Thanks @shamil98 @ganibl