3x+4=20 solve using the box method

Geometry answer picture question pls . reason and statements

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

For the equations below which statement is true ? -2x=14 6x=-42