What is the equivalent expression for 9(2a + 1)

18a + 9

Step-by-step explanation:

If you use the distributive property you can calculate your answer.

Example:

9 times 2a = 18a

9 times 1 = 9

So that gives you the answer 18+9

a = 11 : 4

b = 38

c = 1 for every 6

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: