60 Points solve for x and show work -x + 6 = 4

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

What is the value of x in the equation7x+2y=48 when y=3