Early one morning sandy took out one half of the coins from her coin bank, and in the evening she put in 20 coins. the next morning she took out one third of the coins in the bank, and that evening she put in 4 coins. the next morning, she took out one half the coins in the bank, leaving 15 coins. how many coins were in the bank to begin with?

898.1666667

step-by-step explanation:

5389/6 = 898.1666667

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

1. 2

2. 11

3. 5

4. 6

5. 7

6. 5

7. -1

8. 1

step-by-step explanation: