Answer:
y = 15
Step-by-step explanation:
x + y + z = 45 → (1)
Given
y = (x + z)
Multiply both sides by 2 to clear the fraction
2y = x + z ← substitute into (1)
2y + y = 45
3y = 45 ( divide both sides by 3 )
100%
it would be C. d=24h
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