½x - ⅓y = 0 / ·6
x + y = 50
3x - 2y = 0
x = 50-y
150-3y-2y=0
150 = 5y
y=30
x=20
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½x - ⅓y = 0 / ·6
x + y = 50
3x - 2y = 0
x = 50-y
150-3y-2y=0
x = 50-y
150 = 5y
x = 50-y
y=30
x=20