Distributive
Step-by-step explanation:
3(x + 5) = 7x - 13 Â given
3x + 15 = 7x - 13 Â distribute
- 3x -3x  Subtraction property of equality
15= 7x - 13
+13 +13 Â Â Addition property of equality
28 = 7x Â
7 7 Â division property of equality
4=x  simplify
x=4