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24 September, 13:24

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

+3
Answers (1)
  1. 24 September, 13:46
    0
    Distributive

    Step-by-step 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
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