rknabb
17.06.2020 •
Mathematics
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
Solved
Show answers
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Ответ:
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
Ответ: