Question

(b) P is the point of intersection of the lines with equations 5x + 3y = 9 and 7x – 2y = 25
Write down the coordinates of P.

Answer 1

Step-by-step explanation:

• 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).
• Page No 5:

Answer 2

Step-by-step explanation:

7x-2y=25

5x+3y=9

multiply 1st equ3

second २