The largest house made out of playing cards used 91,800 cards. to the nearest thousand, how many cards were used?

Round to the nearest thousands (underlined and bolded): 91800

Look at the place value to the right of the one you are solving for (hundreds place in this case). The value is 8, which is greater than 5. Because it is greater than 5, you round up

91800 rounded to the nearest thousand is 92000.

~

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:

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation: