A sheet of plywood was made by gluing 7 sheets of wood together.

2 of the sheets were 0.0625 inch thick and the rest were 0.125 inch thick.

how thick was the plywood?

We can use the equation y=2 (0.0625) + 5 (0.125), y being the thickness of the plywood.

I got 5 (0.125) because two sheets of the 7 were already used, meaning there are 5 sheets of plywood left over.

y=0.125+0.625

y=0.75

Therefore, the plywood is 0.75 inches thick.