Solve the following system of equations by substitution. PLEASE HELP!

Solve |2x - 5| = 4 if anyone could , that would be great

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

Don't answer if you don't know steve completed 9 homework problems in class. the function p(m) relates the time (in minutes) steve spent on his homework at home to the total number of problems he completed. the input is the number of minutes worked. the output is the number of problems completed. a. m(p) = 54p-6 b. m(p) = 6p - 54 c. m(p) = 54p +6 d. m(p) = 6p +54