Simplify both sides of the equation: 0.5(2x+2)=-4 Distribute: (0.5) (2x) + (0.5) (2) = -4 You will get x + 1 = -4 (subtract from both sides.) x=-5 0.5(2*-5+2)=4 <- that was the check So now you know you’re correct!! So that’s you’re final answer x= -5 Hope I helped!!
So.. in this case, the starting amount is the 500mg sample... and the rate of decay, negative rate, is 1%, and at the time, the elapsed days is 0, to t = 0, P = 400
