Answer:
x >/= 8.6
Add 9.5 to 42.1 then divide by 6
Step-by-step explanation:
10 books because the ratio is 2:5 and you have 4:x so x=10 ((:
Let's say X is the first brother's age
x+2 is second brother, and x+4 is the third brother
Since the product of the first and third boy x(x+4) is 20 more than twice (20+x(x+2), our equation is x(x+4)=20+2(x+2)
Simplify from there and see what you get.
Answer:
x=3.5
Step-by-step explanation:
6x-1=4x+6
6x-4x=6+1
2x=7
x=3.5