Let's solve each equation at a time.
Distributive Property: a(b + c) = ab ac
Equation #1:
4(5x + 2)
(4 * 5x) + (4 * 2)
20x + 8
Equation #2:
2(12x + 13)
(2 * 12x) + (2 * 13)
24x + 26
Equation #3:
5(x + 3)
(5 * x) + (5 * 3)
5x + 15
Equation #4:
7(2x + 3)
(7 * 2x) + (7 * 3)
14x + 21
Best of Luck!