Question

slove by cross multiplication method,8x-3y=12;5x=2y+7​

Answer 1

Step-by-step explanation:

8x-3y-12=0

5x-2y-7=0

=x/(-12)(-2)-(-3)(-7)=y/(8)(-7)-(5)(-12)=1/(8)(-2)-(5)(-3)

=x/24-21=y/-56+60=1/16-15

=x/3=y/4=1/1

x=3 and y=4

please like and follow

Answer 2

Answer:

x=3 and y=4

Step-by-step explanation:

First equation is as follows:

=> 8x=12+3y

=> x= (12+3y) divide by 8

Second equation is as follows:

=> 5x= 2y+7

=> x = (2y+7) divide by 5

Substitute value of x:

=> (12+3y) divide 8 = (2y + 7)divide 5

Cross multiplication:

=> 5(12+3y) = 8(2y+7)

=> 60 +15y = 16y +56

=> 60-56 = 16y-15y

∴ y=4

Now use y=4 to find x using either one equation:

=>8x =12+3y

=>8x = 12 + 3(4)

=>8x = 12 + 12

=>8x = 24

∴ x = 3