By applying the additive property of equality to the equation 3x-7=20, we added 7 to both sides and then divided by 3, finding that Jenny has 9 blue marbles.
To help Jenny determine the number of blue marbles she has, let's solve the equation 3x−7=20 using the additive property of equality.
Add 7 to both sides of the equation to isolate the term with x: 3x − 7 + 7 = 20 + 7, which simplifies to 3x = 27.
Divide both sides by 3 to solve for x: 3x / 3 = 27 / 3, hence x = 9.
Jenny has 9 blue marbles in her bag.
The probable question may be:
Jenny has a bag of marbles. The number of blue marbles she has is represented by the equation 3x−7=20, where x is the number of blue marbles. To find out how many blue marbles she has, she uses the additive property of equality to solve for x. Can you help Jenny determine the number of blue marbles by applying the additive property of equality?
Additional Information:
Jenny's bag of marbles is a mix of colors, and she's particularly interested in knowing the count of blue marbles. The equation 3x−7=20 describes the relationship between the unknown quantity of blue marbles (x) and the total number of marbles (20) after considering a subtraction of 7. In solving for x, Jenny uses the additive property of equality to isolate the term 3x. The result will reveal the number of blue marbles she has.