Solve this problem the - is a negative sign. (2b+-7)+5(b+-3)

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

How do i put 3(x+7) in distributive property

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.