Question

slove for x and y by elimination method -5x+7y=2
3x+7y-10=0​

Answer 1

Answer:subtract 7 from both sides ,-5x=2,3x-10=0 , 2-7=-5,0-7=-7,-5+-7=-12,,3x=12,x=4

Step-by-step explanation:

Answer 2

Answer:

x = -6 ., y = 4

Step-by-step explanation:

-5x + 7y = -2. --------------------------> 1

3x + 7y = 10. --------------------------->2

Now

multiplying eq 1 by 3 and eq 2 by 5

so

-15x + 21y = 6

15x + 35y = 50

- - +

---------------------

14y = 56

so y = 56/14

y = 4

now putting the value of y in eq 2

3x + 7 ( 4 ) = 10

3x + 28 = 10

3x = 10 -28

3x = -18

x = -18 / 3

x = -6

------------------------------------------------------------------------

Hope it will help you