William gave 4 football cards to each
of his friends. Suppose he had
54 cards left. Write and solve an
equation to find how many cards each
riend initially had.

Step-by-step explanation:

You can’t really find how many cards until we know how many they have now.  Each friend had 6 or less than they have now.

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