# Surf for More Math

## Lesson 8- Variables in Equations

To encourage your child to have fun on the Web while learning to Variables
in Equations, here are some games and interactive activities they can
do on their own or in pairs.

**Goal**

Solve equations including symbols representing variables.

**Builds Upon**

Student Book pages 26-27

**Instructions for Use**

Algebra
Balance Scales allows your child to solve simple equations through
the use of a balance beam.

To use Algebra Balance Scales, click and drag u nit blocks and X-boxes
from bins to the balance beam pans to represent the equation. When the
beam balances from the given linear equation, your child can perform
any arithmetic operation. To keep the beam balanced, the same operation
must be done on both sides of the equation. The goal, is to get a single
X-box on one side, with however many unit blocks needed for balance
on the other side to find the value of X.

Once the equation is represented, click the ' Continue' button. Click
on any of the other buttons, to add, subtract, divide, or multiply.
Do the same operation to both sides of the equation. In the text box,
have your child input what they want to add to or subtract from both
sides, and click the Go! button. Your child can, for example, subtract
2X from both sides, if there are two X-boxes on both sides. Multiply
or divide only by numbers, and only if the operation can be done in
whole numbers. The equation is updated with each operation. When your
child has a single X-box on one pan and blocks on the other pan, the
equation displays the solution.