Question

1. a pan balance has 3 cubes on one pan and 11 cubes on the other pan. lucy thinks she should add 7, 8, 9, or 10 cubes to make the pans balance. how can you use the equation 3 + c = 11 to find the number of cubes lucy should add?

Explanation:

Step1: Identify the equation

We have the equation \( 3 + c = 11 \), where \( c \) is the number of cubes to add.

Step2: Solve for \( c \)

To solve for \( c \), we use the subtraction property of equality. Subtract 3 from both sides of the equation:

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So we find that \( c = 8 \), which means Lucy should add 8 cubes.

Answer:

Lucy should add 8 cubes. The process is solving the equation \( 3 + c = 11 \) by subtracting 3 from both sides to get \( c = 8 \).