Question

What is the other equation? what is x and y

Answer 1

• The first equation:

`{ \rm{3y = x - 25}} \\ \\ { \boxed{ \rm{x - 3y = 25}}}`

• The second equation:

`{ \rm{3y + (x - 25) = 118}} \\ \\ { \boxed{ \rm{3y + x = 143}}}`

• Adding the first equation and second equation:

`{ \underline{ \rm{ + \binom{x - 3y = 25}{x + 3y = 143} }}} \\ { \rm{2x + 0y = 168}} \\ \\ { \tt{2x = 168}} \\ \\ { \boxed{ \boxed{ \tt{ \: \: x = 84 \: \: }}}}`

• find y from first equation:

`{ \rm{x - 3y = 25}} \\ \\ { \tt{84 - 3y = 25}} \\ \\ { \tt{3y = 59}} \\ \\ { \boxed{ \boxed{ \tt{ \: \: y = 19.67 \approx \: 20}}}}`