Question

1. Which of the following algebraic equations are linear equations and why?
a) r-1<4
b) y > 5
c) X-9 = 12 d) 8 + y + 2 = 5​

Answer 1

Answer:

x+y=14 ....(i)

x−y=4 .....(ii)

From (ii) y=x−4 ...(iii)

Substituting y from (iii) in (i), we get

x+x−4=14

⇒2x=18

⇒x=9

Substituting x=9 in (iii), we get

y=9−4=5,

i.e, y=5

x=9,y=5