Question

Solve by Cross multiplication Method
1) x + 2y - 3 = 0; 3x - 2y + 7 = 0
2) 2x - 3y = 5; 3x + 4y = -1​

Answer 1

Step-by-step explanation:

Hey friend,

HERE IS THE ANSWER

2x+3y-9=0---------(1)

3x+4y-5=0---------(2)

Multiply equation (1) by 4 and Equation (2) by 3.

➡(4)(2)x+(4)(3)y+(4)(-9)=0---------(3)

➡(3)(3)x+(3)(4)y+(3)(-5)=0---------(4)

Subtracting Equation (4) from equation (3),we get

➡[(2)(4)-(3)(3)]x+[(4)(3)-(3)(4)]y+[(4)(-9)-(3)(-5)]

Therefore

➡x=-[(4)(-9)-(3)(-5)]

___________

(2)(4)-(3)(3)

➡x=(3)(-5)-(4)(-9)

__________------------(5)

(2)(4)-(3)(3)

If Equations (1)and (2) are written as

a₁x+b₁y+c₁=0 and a₂x+b₂y+c₂=0

a₁=2,b₁=3,c₁=-9,a₂=3,b₂=4,c₂=-5

Therefore equations (5)

-15+36

x=________

8-9

=-21

y=17

similarly

Hope it helps