Question

solve. 2 by X + Y + 5 x minus y equal to 3. and. 7 by X + Y - 2 by x minus y equal to 4 ​

Answer 1

Step-by-step explanation:

2(x+y) +5x-y =3

2x+2y+5x-y= 3

7x-y=3 1 equation

7(x+y)-2(x-y) =4

7x+7y-2x+2y=4

5x+9y=4 2 equation

now solve equation 1 and 2

7x-y=3 (by elimination method)

5x+9y=4

7x-y=3 multiply by 5

5x+9y=4 multiply by 7

the new equations become

35x - 5y = 15. equation 3

35x+ 63y = 28 equation 4

by solve this y=13upon68

putting the value of y in equation 1

the value of x is 217 upon 476

thank you