Question

Solve these equations using elimination not substitution? 8x + 3y = 13 3x + 2y = 11 15 Points!

Answer 1

x = -1, y = 7

Explanation:

8x + 3y = 13

3x + 2y = 11

Multiply the first equation by -2 and the second equation by 3. Then add them.

-16x - 6y = -26

(+) 9x + 6y = 33

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

-7x = 7

x = -1

Now substitute x = -1 in the first original equation and solve for y.

8x + 3y = 13

8(-1) + 3y = 13

-8 + 3y = 13

3y = 21

y = 7

Answer: x = -1, y = 7