Four Equations

Algebra Level 2

$\begin{aligned} x+x+y&=14\\ L+L+z&=20\\ x+y+z&=12\\ x+z+L&=18 \end{aligned}$

If numbers $x,y,z,L$ satisfy the equations above, find the value of $x+z$

1 solution

Nikkil V
Mar 4, 2016

From 1st equation, we get y=14-2x

Substituting it in 3rd equation we get x=2+z

Substituting it in 4th equation we get L=18-2(1+z)

Substituting it in 2nd equation we get z=4

Substituting it in x=2+z we get x = 6

Now x+z = 6+4 = 10

good , I did the same

Aswin T.S. - 5 years, 3 months ago

upvote it PLZ

Nikkil V - 5 years, 3 months ago

hey I already upvoted

Aswin T.S. - 5 years, 3 months ago

@Aswin T.S. – SRY its an old reply

Nikkil V - 5 years, 3 months ago

@Nikkil V – all the best for your sa 2 exam..do it well,

good night.

Aswin T.S. - 5 years, 3 months ago

@Aswin T.S. – SAME TO U gud nite

Nikkil V - 5 years, 3 months ago

I think you are good in algebra ,

try this question 'A sub zero level question' which you can found that question in my post..

Aswin T.S. - 5 years, 3 months ago

Lol I am not that good in algebra. Isolved it

Nikkil V - 5 years, 3 months ago