-20a+15 _______ -(2a+3)*(-3)= 5

*5 (-20a+15)-5*[(2a+3)*(-3)] (-20a+15)-5*[-6a-9] (-20a+15)+30a+45 -20a+15+30a+45 10a+60

-20a+15 ________ -(2a+3)(-3) = -20a+15 5 _______ + (6a+9) /*5 = 5 -20a+15 +30a +45 = 10a+60 10a= (-60) /÷10 a = (-6)