Im really struggling and need some help filling these out if you can

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Need asap. solve for the following inequality

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22