Solve for b then find the value of b when a=3
4a=2b-7

Me asap on # : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years