Solve the equation x + y = 58 y-4 / 5x = 4

Solve the equation x + y = 58 y-4 / 5x = 4

According to Y - 4x / 5 = 4
Y = 4 + 4x / 5
Substituting x + y = 58,
4 + 9x / 5 = 58
That is 9x / 5 = 54
The solution is x = 30
Substituting x + y = 58, we get y = 28
So the solution of the equations is x = 30, y = 28