Question

9x-3y=4,7x +6y=9 solve by elimination method ​

Answer 1

Solution=(17/25,53/75)

Step-by-step explanation:

Given equations are

9x-3y=4-----(1)

7x+6y=9----(2)

Multiplying (1) with 2 then. it becomes

=>18x-6y=8-----(3)

adding (2)&(3) to eliminate the variable 'y'

7x+6y=9

18x-6y=8

(+)

________

25x+0=17

_______

=>25x=17

=>x=17/25

Substitute the value of x in (1) then

=>9(17/25)-3y=4

=>(153/25)-3y=4

=>3y=(153/25)-4

=>3y=(153-100)/25

=>3y=53/25

=>y=53/(25×3)

=>y=53/75

The values of x=17/25 and y=53/75

Solution=(17/25,53/75)

Answer 2

Answer:

9x-3y=4_1;7x+6y=9_2

Step-by-step explanation:

multiply eq1 by2

18x-6y=8_3

add eq2and 3

7x+6y=9

+18x-6y=8

=25x=17

x=17/25

put x=17/25 eq1

9*17/25-3y=4