Question 111381
let x be the number.
x/4 + x/5 = 13 + x/8
10x+8x=520+5x Multiply 40 by both sides to eliminate fractions.
18x-5x=520+5x-5x
13x=520
13x/13=520/13
x=40
Always check:
40/4 + 40/5 = 13 + 40/8 true
Ed