Answer:
x = -1 
Step-by-step explanation:
f(
) = 120, therefore we can create this equation:
120 = 150 ÷ (
- z)
cross-multiply to get: 24 - 120z = 150
-120z = 126
z = -1 
Answer:
Elgas is 35.
Step-by-step explanation:
Let's set up an equation.
Alvin is 7 years younger than Elgas.
A = E - 7
The sum of their ages is 63.
A + E = 63
Let's use substitution.
Plug in the first equation of A into the second equation.
A + E = 63
(E - 7) + E = 63
Combine like terms.
2E - 7 = 63
Add 7 to both sides.
2E = 70
Divide both sides by 2.
E = 35
Elgas is 35.
Hope this helps!
Is the x in between the 5 and 6 supposed to be a multiplication symbol?<span />