HELP PLEASE An unknown number bis 10
more than an unknown number k. The number bis also k less than 8. The equations to find
k and b are shown below:
b + 10
b-k+8
Which is a correct step to find k and b?

Write the points where the graphs of the equations intersect the x-axis.
Write the points where the graphs of the equations intersect the y-axis.
Add the equations to eliminate k.
Multiply the equations to eliminate b.