Solve the system by substitution.

Question

2x + y = -11
3x - 4y = 11

(3, 5)
(–5, –3)
(–3, –5)
(5, 3)
How?

Answer 1

y = 11 - 2x

3x - 4y = 11

Substitute 11-2x for y in the second equation and solve for x. Insert that value into the first equation to solve for y. Check by putting both values into the second equation.

Answer 2

I am sure PsyDAG meant to say
y = -11 - 2x

and to sub -11-2x or y in the second equation

Answer 3

Thank you, that makes more sense.