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 )
y = 15
Answer:
1/2
Step-by-step explanation:
Answer:
-a(a+4)/(16 - a²)
Step-by-step explanation:
a/(a - 4) Multiply by (a + 4)/(a + 4)
= a(a + 4)/[(a – 4)(a + 4)] Multiply the denominatorator terms
= a(a + 4)/(a² - 16) Multiply by -1/(-1)
= -a(a+4)/(-a² + 16) Reorder terms in denominator
= -a(a+4)/(16 - a²)