Question

how to solve by elmination method:
3x-5y-4 = 0; 9x-2y = 7

Answer 1

Answer:

x=5/9

y=-1

Step-by-step explanation:

3x-5y-4=0___(1)

9x-2y=7

9x-2y-7=0____(2)

(1)x3=>9x-15y-20=0

(2)x1=>9x-2y-7=0

=>-9x+2y+7=0(after changing the Singh)

=>-13y-13=0

=>-y-1=0(by dividing 13 through out)

=>y= -1

substitute y=-1 in (2)

9x-2x(-1)-7=0

=>9x+2-7=0

=>9x=5

=>x=5/9