100k views
5 votes
–6x + 2y = 16 -7x + 6y = 26

User Wei Jin
by
8.2k points

1 Answer

3 votes

Answer

x = -2

y = 2

Step-by-step explanation

This is a simultaneous equation

-6x + 2y = 16

-7x + 6y = 26

Multiply the first equation by 3 and the second equation by 1

-6x + 2y = 16

-7x + 6y = 26

becomes

-18x + 6y = 48

-7x + 6y = 26

Subtract equation 2 from equation 1

-18x + 6y = 48

-7x + 6y = 26

_______________

-18x - (-7x) + 6y - 6y = 48 - 26

-18x + 7x = 22

-11x = 22

Divide both sides by -11

(-11x/-11) = (22/-11)

x = -2

We can then solve for y using any of the two original equations

-6x + 2y = 16

-6 (-2) + 2y = 16

12 + 2y = 16

2y = 16 - 12

2y = 4

Divide both sides by 2

(2y/2) = (4/2)

y = 2

Hope this Helps!!!

User Ozan Deniz
by
8.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories