What is the least common multiple you could use to find 4/5 + 5/6

30

Step-by-step explanation: 30 is the first multiple that both 5 and 6 share, and as such should be the denominator

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: