In the problem 10-4 = 6 what is the correct term for the number for

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

What does x = in this equation x+3+2x=x+5

What is the difference between the predicted value and the actual value