Question

solve by substitution method 2 X + 3 Y is equal to 9 3 X + 4 Y is equal to 5​

Answer 1

2x + 3y = 9 ....(1)
3x + 4y = 5 ....(2)

(1) × 3 => 6x + 9y = 27

(2) ×2 => 6x + 8y = 10

by adding both the equations, we get

y = 17

substitute, the value of y in (1)

2x + 3y = 9

2x + 3(17) = 9

2x + 51 = 9

2x = 9-51

2x = -42

x = -21


=> x = -21 and y = 17

#Hassan