36.
90 times 2/5 (or 0.4) is equal to 36
it could be 2.2 because every 5 you get 2 so it would be 10 and 4 so when y=6 then x should be 2.2.
Maybe is 71 because 60 + 11 is 71 and is basically saying when paul turns 11 how old will his grandfather be ...
Answer:
6
Step-by-step explanation:
First we solve for y₁
3×5 - 5y₁ = 20
15 - 5y₁ = 20
-5y₁ = 20 - 15
-5y₁ = 5
y₁ = -1
(5, -1)
Now we solve for x₂
3x₂ - 5×2 = 20
3x₂ - 10 = 20
3x₂ = 20 + 10
3x₂ = 30
x₂ = 10
(10, 2)