Mr. rodriguez bought 420 pencils for the school. if there are 10 pencils in a box ,how many boxes of pencils did he buy?

He bought 42 boxes of pencils.

Step-by-step explanation:

Given : Mr.Rodriguez bought 420 pencils for the school.

If there are 10 pencils in a box, then by using DIVISION OPERATION, we have

The number of boxes of pencils he bought is given by :-

Therefore, he bought 42 boxes of pencils.

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:

the correct answer is x/3+10≥32

hope this !