Question

solve the system by substitution .
2x+y=-11
3x-4y=11\

a.(3,5)
b.(-5,-3)
c.(-3,-5)
d.(5,3)

Answer 1

It's C. Would you like me to show you the work?

Answer 2

yes please

Answer 3

@jtug6

Answer 4

Rearrange the first equation to look like this:
2x+y=-11
y=-2x-11

Then plug in the y value in the second equation:
3x-4y=11
3x - 4 (-2x - 11) = 11
3x + 8x + 44 = 11

Combine like terms:
11x + 44 = 11

Subtract 44 from each side:
11x + 44 (-44) = 11 (-44)
11x = -33
Divide 11 from each side:

11x/11 = -33/11
x = -3

Now that you have your x value (-3), you can solve for y using any of the two equations.
I chose 2x + y = = -11

Plug in your x value:
2 (-3) + y = -11
-6 + y = -11

Add 6 to each side:
-6 (+6) + y = -11 (+6)
y = -5

Your answer would be (-3, -5)

Answer 5

Oops! I'm sorry was busy rose is 100% correct. Ty rose for showing fan'd and medal'd

Answer 6

lol.

Answer 7

rose is SO SMART!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!