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In a class of 30 students: 4x use cellular phones X use cellular and mobile phones 20 use mobile phones and 2 use neither Solve for x

In a class of 30 students, 4x use cellular phone, x use both cellular and mobile phones, 20 use mobile phones and 2 use neither mobile nor cellular phones, What is the value of x?

Posted in Algebra, asked by Mary , 6 years ago. 1507 hits.

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x students uses mobile and cellular phones,

4x-x uses cellular phones,

20-x students use mobiles,

2 students don,t use any thing

now we put the given values in equation,4x-x+x+20-x+2=30

                                                        => 3x+22=30

                                                         =  3x=30-22

                                                         =3x=8

                                                         =x=8/3

 

Venkat Nagendra Thati
Venkat Nagendra Thati - 6 years ago
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