Question

solve the simultaneous equation using elimination method (i) 2x- y =2, 5x+y = -9​

Answer 1

Answer:

Explanation:

Step 1) Solve the first equation for

y

:

5

x

−

5

x

+

y

=

15

−

5

x

0

+

y

=

15

−

5

x

y

=

15

−

5

x

Step 2) Substitute

15

−

5

x

for

y

in the second equation and solve for

x

:

Step 3) Substitute

1

for

x

in the solution to the first equation in Step 1) and calculate

y

:

y

=

15

−

5

⋅

1

y

=

15

−

5

y

=

10

Answer 2

Answer:

x = (-1) and y = 4

Step-by-step explanation:

2x-y = 2. ( Given)------ eq 1

5x+y = -9. ( Given)------ eq 2

Adding eq 1+2, we get:

2x+5x = -7

7x= -7

x = (-1)

Now, Putting X=(-1) in eq 1 we get:

2(-1)-y = 2

-2-y = 2

y = 2+2 = 4

hope it helps u..

Please mark as brainliest...