Question

By elimination method: 2x+3y=18 , -7x+9y=15

Answer 1

Step-by-step explanation:

2x+3y=18

multiply by 3

6x+9y= 54 ...(1)

-7x+9y=15 ...(2)

subtract equation 1and 2

-x =39

x =- 39

putting x= -39 in equation 1

2(-39) +3y=18

-78+3y=18

3y=10+78

3y=88

y = 88/3