Question

If 3x +5y=9 and 5x+3y=7,then find the value 5x+5y

Answer 1

Answer:

10

Step-by-step explanation:

use elimination to find the value of x and y

it comes out to be

x= 0.5

y= 1.5

Answer 2

Answer:

3x+5y= 9______(1)

5x+3y= 7______(2)

so, by elimination method

(1) ×5 and (2) ×3

===>15x+25y=45

===>15x+9y=21

Now, by solving 25y-9y=45-21

==>16y=24

==>y=3/2

so, x=9-5y

x=9-15/2

x=3/2

Hence, the value of x and yr is 3/2.

So,5x+5y=15.