Solve the system using any method: 4x-3y= -13 x+3y= -7?

Question

please please help me

Answer 1

4x-3y= -13
x+3y= -7
When you combine like terms, the 3y and -3y cancel out:
5x= -20
Divide by 5 to get x alone:
x= -4

Now, put -4 into an equation to get y:
4x-3y= -13 becomes:
4(-4)-3y= -13
-16 - 3y= -13
Add 3y to both sides:
-16= -13+3y
Add 13 to both sides:
-3=3y
Divide both sides by 3 to get y alone:
-1=y

Now, check with the final equation:
x+3y= -7
-4+ 3(-1) =-7
-4+ (-3) = -7
-7 = -7

You can also check with the other equation just in case:
4x-3y= -13
4 (-4) - 3 (-1) = -13
-16 - (-3) = -13
-13 = -13

Answers
x= -4
y= -1

Answer 2

Subtitution Method YEAH 2 POINTS

4x - 3y = -13(eq 1
x+ 3y = -7 (equation 2 ) --- x = -3y -7
put eq 2 into eq 1

4(-3y-7) -3y = -13
-12y-28 -3y =-13
-15y = -13 + 28
-15y = 15
y = -1

to sovle for x put y into eq 1
x = -3y - 7
x = -3( -1 ) -7
x= 3 -7
x = -4
there fore the solution to the problem is x= -4 , y= -1

Answer 3

Simple. Here are the equations:

4x - 3y = - 13 ....(eq 1)
x + 3y = - 7 ....(eq 2)


Take eq 2 and sove for x

x + 3y = -7
x = -3y -7


Then replace x = -3y -7 in eq 1

4(-3y -7) - 3y = -13
-12y -28 -3y = -13
-12y -3y = -13 +28
-15y = 15
y = -1

Now, substitute y = -1 in any equation, let's choose eq 2

x = -3(-1) -7
x = 3 -7
x = -4

So, your answer is (-4, -1)

Got it?

Answer 4

www.quickmath.com go there and find the type of problem and tada! your done!