The following cost equations are given for electric and solar heating back in 1990:

electric- C= 5000 + 1000n

gas - C= 12,000 +700n

I turned the 2 eqautions into y=mx+b form and then graphed them. Later it asked me to label the point on the graph where the electric and gas heating costs are equal ( 14, 2400 )

Then it asked me to use the equations to find a better, more accurate solution. What does this mean? What equation? How do I solve this? HELPPP