Lucy correctly answered 70% of the questions on her science homework. she counted 14 correct answers on her paper .if each question is of a equal value ,how many questions did lucy have on her science homework

Lucy has 20 questions in her science home work

Solution:

Given that,

Lucy correctly answered 70% of the questions on her science homework

She counted 14 correct answers on her paper

To find: Number of questions in her science home work

Let "x" be the number of questions in her science home work

From given we can say,

Lucy correctly answered 70% of questions

She counted 14 correct answers

70 % of total questions = 14 correct answers

70 % of x = 14

Thus Lucy has 20 questions in her science home work

ab: 2 n83b8eb7ebi. 8e yen in

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: