If 2x + y = 10 and x = 3, what is x – y

Answer Posted / etty

2x+y=10x=3
so,
2*3+y=10
6+y=10
y=10-6
4

so
x=3
y=4
so,x-y=3-4
=-1 ans

Is This Answer Correct ?    10 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Hi Guys. I am an Instrumentation and Control Engineer(ICE) and have filled various PSU entrance exam forms. I wanted to know if anyone of you out there had any material for the preparation of the same. Any sort of material will be greatly appreciated. Be it previous year questions (Aptitude, GK or Technical) , study material or links to websites which do have this material. PSUs that I am going to appear in are HPCL, SAIL, ECIL and finally Gate. Any suggestions and advice is greatly welcomed. My E-Mail ID is kris_sreekanth86@yahoo.co.in

1725


A trip takes 6 hours to complete. After traveling 1/4 of an hour, 1 3/8hours, and 2 1/3 hours, how much time does need to complete the trip? There are 30 socks in a drawer. 60% of the socks are red and the rest are blue. What is the minimum number of socks that must be taken from the drawer without looking in order to be certain that atleast two blue socks have been chosen?

1617


In a lock of 4 rings there r five characters how many unsuccessful attempts can be made ?

757


If A=Z, B=Y, C=X, .......... Z=A, Then POCKET = ?

740


complete the series: x y z u v w r s t __

1348






Explain the Binomial theorem?

664


A farmer has a farm square of 100 sq.m a cow is tied at one and with a rope of 10m length.assume pi-3.what is the area of land the cow can graze.

792


A bus started from bustand at 8.00am, and after staying for 30 minutes at a destination, it returned back busstand. The destination is 27 miles from the busstand. The speed of the bus is 18mph. During the return journey bus travels with 50% faster speed.At what time does it return to the busstand?

760


The ratio of the number of boys and girls in a school is 3:2 Out of these 10% the boys and 25% of girls are scholarship holders. % of students who are not scholarship holders.?

796


the minimum of (2x+1)**2 + (x+2) is at x =

688


what is the number whose reminder is 2 after dividing 5and also reminder is 4 after deviding 7 and reminder is 6 after deviding 9?

1820


There N stations on a railroad. After adding x stations 46 additional tickets have to be printed. Find N and X.

735


If r = 5, n=3 and if first pole has 2 flags, third pole has 1 flag, how many ways can the flags be arranged?

696


It takes five minutes to pass a rumor from one person to two other persons. The tree of rumor continues. Find how many minutes does it take spread the rumor to 768 persons.

948


A boy multiplied a number with 10 and got 100,instead of dividing it . If he divided it what would be the answer?

1007