SIMULTANEOUS EQUATIONS 1

Solve the following equations by substitution method.

4x - 2y = 6

x + y = 9

solution

4x - 2y = 6 ……………….(i)

x + y = 9……………….(ii)

1(4x - 2y = 6

 2(x + y = 9

By using elimination method,

   4x - 2y = 6

  2x + 2y = 18

    6x  + 0    = 24

6x = 24

6      6

x = 4

from equation (1),

x + y = 9

y = 9 – x

y = 9 - 4

y = 5

Hence x=4 and y=5.

TRY THIS........

Solve the following equations by substitution method.

4x - y = 8

2x + y = 34