Question

Use substitution.
2x + 3y = 5
4x - y = 17


Use linear combinations:
2x + 3y = 5
4x - y = 17

Answer 1

1)
2x + 3y = 5
4x - y = 17
First, isolate one of the variables.
4x - y =17
4x = 17 + y
y = 4x - 17
Then, put what you got for y into the other equation.

2x + 3(4x-17)=5
2x + 12x - 51 = 5
14x - 51 = 5
14x = 56
x = 56/14
x = 4

THEN, plug your answer for x back into one of the equations, and solve for y!
2(4) - 3y = 5