Question

Solución y comprobación de:
-Y + 120= 3Y - 3

Answer 1

Resolver.

- y + 120 = 3y - 3
120 + 3 = 3y + y
123 = 4y
123/4 = y

Comprobacion.
-y + 120 = 3y - 3
- 123/4 + 120 = 3(123/4) - 3
- 123/4 + (120*4)/4 = 369/4 - 3
- 123/4 + 480/4 = 369/4 - 12/4
(- 123/4 + 480/4) = ( 369/4 - 12)/4
357/4  = 357/4