Question

x - y = 6 x = y + 2 Solve the system of equations by substitution. no solution (6, 0) (4, -2) coincident

Answer 1

Answer:

Page No 4:

Question 1:

Complete the following activity to solve the simultaneous equations.

5x + 3y = 9 -----(I)

2x + 3y = 12 ----- (II)

ANSWER:

Disclaimer: There is error in the Q. In (II) there should have been 2x − 3y = 12

5x + 3y = 9 -----(I)

2x − 3y = 12 ----- (II)

Add (I) and (II)

7x = 21

x = 3

Putting the value of x = 3 in (I) we get

5(3)+3y=9⇒15+3y=9⇒3y=9−15=−6⇒y=−2

Thus, (x, y) = (3, −6)