A student deposits $100 into a savings account. The account pays interest rate compounded annually, where is expressed as a decimal. The expressions below represent the account balance two years from now and three years from now. Two years from now: Three years from now: Shown below is an attempt to find a simplified expression that represents the amount of interest earned in the third year. In which step, if any, does the first error occur?

step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.