Question

solve using cross multiplication method.
5x+8y=9
2x+3y=4
​

Answer 1

Step-by-step explanation:

5x+8y=9....(1)

2x+3y=4....(2)

Multiplying equ (1) by 3 & equ (2) by 8,

15x+24y=27....(3)

16x+24y=32....(4)

Subtracting equ (3) & equ (4),

15x+24y=27

- 16x+24y=32

-x+0y= -5

-x= -5

x= 5

Substituting the value of the x=5 in equ (1),

5x+8y=9

5(5)+8y=9

25+8y=9

8y=9 - 25

8y= -16

y= -16

8

y= -2

(x,y)= (5,-2) is the solution.

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