Question 24587
y=x^2+2x-2
y=3x+4
substitute 3x+4 for y in the first equation.
3x+4=x^2+2x-2
Then solve.
0=x^2-x-6
Factor.
x=3

Substitute x back into the equation to find y.  
y=3(3)+4
y=13

Check by substituting x and y into the first equation to make sure it works.
y=x^2+2x-2
13=3^2+2(3)-2
13=13

Hope I could help.