5x +4y = -1

Question

what is the answer to this question??? how do you solve this equations?

 

 

• 5x + 4y = -1
• -7x - 2y = -13

Answer 1

Hi Amber,

 

You are asked the find the intersection of 2 linear equations.

 

There are at least 3 different ways to solve the problem:

1) Substitution

2) Elimination or

3) Graphing.

 

For substitution and graphing, rearrange both equations to Slope-Intercept form.

5x + 4y = -1 becomes Y = -5/4 x - 1/4

-7x - 2y = -13 becomes Y = -7/2 x + 13/2

 

For substitution set Y=Y or -5/4 x - 1/4 = -7/2 x + 13/2

solve for X then solve for Y by inserting the value of X into either equation.

 

Or graph each linear equation and find where the 2 lines intersect.

 

Does that help?

 

Bob

 

X = 3 and Y = -4