Question

Solve the system of equations using the elimination method.

6x - 5y = 21
2x + 5y = -5

Answer 1

Answer:

x=2; y= -9/5

Step-by-step explanation:

6x-5y = 21 ---------- eqn 1

2x+5y = -5 --------- eqn 2

Harding both the equations we get:

6x+2x +5y-5y = 21-5

8x + 0 = 16

x = 16/8 = 2

Substituting the value of x in eqn 1 we get:

6*2 - 5y = 21

12 - 5y = 21

5y = 12-21 = -9

y = -9/5

Answer 2

Answer:

Add equation 1 & 2 to eleminate 5y from both the equation

6x - 5y = 21

+2x + 5y = -5

–———––––—–

8x = 16

x = 16/8=2

Put l, x=2 in equation (1)

6×2 - 5y =21

-5y =21 - 12

=9

y=-9/5