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2u + 5y = 15
4u = 20
Y = 5,y = 1
2u + 5y = 15
4u = 20
Y = 5,y = 1
[2u + 5y = 15]
Substitute (u = 5):
[2(5) + 5y = 15]
Simplify:
[10 + 5y = 15]
Subtract 10 from both sides:
[5y = 15 - 10 = 5]
Divide both sides by 5:
Solution: [u = 5, \quad y = 1]