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y -pieniądze Asi
x + 15 = 1,5y
x + (y - 15) = 120
x = 1,5y - 15
1,5y - 15 + y - 15 = 120
x = 1,5y - 15
2,5y - 30 = 120 / + 30
x = 1,5y - 15
2,5y = 150 / :2,5
x = 1,5y - 15
y = 60
x = 1,5 * 60 - 15
y = 60
x = 90 - 15
y = 60
x = 75
y = 60
odp. Wojtek dał 75 zł, a Asia 60 zł.