1. Solve the system by substitution - 2x+y=-11, 3x-4y=11.

Answers are:

C

B

B

C

A

In the first equation, moving 2x over gives "y = - 2x-11". Placing this into the second equation gives "3x - 4 (-2x-11) = 11", or "3x+8x+44 = 11", which can be reduced to "11x = - 33" or "x = - 3". Replacing the "x" with - 3 in the first equation gives "-6 + y = - 11" or "y = - 5". This gives a solution of (-3, - 5), or answer C.