489,884 views
17 votes
17 votes
-4x + y = 6
-5x - y = 21
How do I solve this?

User Chad McGrath
by
1.9k points

2 Answers

12 votes
12 votes

Answer:

(-3, -6)

Explanation:

User OpenSource
by
3.0k points
11 votes
11 votes

Answer:

X = -3, Y = -6

Explanation:

To solve this equation, you can use the elimination method.

Since both of the y's cancel out, you are left with -9x=27 (after subtracting the x values)

In the equation -9x=27, you divide both sides by -9 to get that x = -3

If you plug the x-value back into the first equation, you get -4(-3)+y=6

-4(-3)+y=6

12 + y = 6

Subtract both sides by 12 to get the y-value alone

y=-6

User Don H
by
3.0k points