Question

3(x + 5) = 7x - 13

3x + 15 = 7x - 13
- 3x -3x
1557x - 13
+13 +13
28 = 7x
7 7
4=x
x=4
What is the first step of this algebraic proof after the given?
Addition
Subtraction
Division
Multiplication
ОО
Distributive

Answer 1

Distributive

Explanation:

3(x + 5) = 7x - 13 given

3x + 15 = 7x - 13 distribute

- 3x -3x Subtraction property of equality

15= 7x - 13

+13 +13 Addition property of equality

28 = 7x

7 7 division property of equality

4=x simplify

x=4