Solve the following system of equations. Express your answer as an ordered pair in the format (a,b),
-2x+7y=-1
4x-3y=-19

Question

Solve the following system of equations. Express your answer as an ordered pair in the format (a,b), 
-2x+7y=-1
4x-3y=-19

mathstudent55 · Answer

Multiply the first equation by 2 and add it to the second equation. The x variable will cancel out and you can solve for y. Then substitute the value of y into the first original equation, and solve for x. Then write the answer as (x, y) using the values you got for x and y.

anonymous · Answer

for y i got -11/21 and x i got -61/14 and that sounds wrong

mathstudent55 · Answer

-2x+7y=-1
4x-3y=-19
Multiply 1st eq by 2 and write second eq below it:
-4x + 14y = -2
 4x  -   3y  = -19
Add the equations:
          11y = -21
Divide both sides by 11:
y = -21/11
How did you get y = -11/21?

anonymous · Answer

i must have mixed the two together by accident 
thank you

anonymous · Answer

so as an answer i would get (-68/11,-21/11)

mathstudent55 · Answer

I'll continue:
Now that we have y = -21/11, substitute it into first original equation:
-2x+7y=-1
-2x + 7(-21/11) = -1
-2x - 147/11 = -1
-2x = -1 + 147/11
-2x = -11/11 + 147/11
-2x = 136/11
x = -68/11
Solution: (-68/11, -21/11)

mathstudent55 · Answer

You are correct.

anonymous · Answer

ok cool thank you i was just making sure