First blank: Substitution or transitive property of equality
Second blank: Subtraction property of equality
Answer:
c and d
Step-by-step explanation:
the x intercepts are the solutions
The perimeter of a rectangle is 30 inches. If its length is three times its width, find the dimensions. 30 inches=2(L+W) Divide each side by 2. 15 inches=L+W Substitute for L.