6n+9=−3n−27; use the drop-down menus to choose steps in order to correctly solve 3+4d−14=15−5d−4d for d.; solve the equation. 4x−13=2x+9; 2−6x=5−5(x−1); 5x−12=−2+5(x−2); use the drop-down menus to complete each equation so the statement about its solution is true.; 2x+22=4(x+3); 2y=7(y−2)+4