Max practices the piano in the guitar for a total of 150 minutes every day he practices guitar 80 minutes more than he practices the piano how much time does Max been practicing the piano every day

Eg. x minutes for piano practice, y minutes for guitar practice

The equation

x + y = 150 (1st equation)

y = 80 + x (2nd equation)

How to solve

change y to 80 + x in 1st equation

x + y = 150

x + 80 + x = 150

2x + 80 = 150

2x = 150 - 80

2x = 70

x = 70/2

x = 35

Max practice the piano 35 minutes everyday