Equivalent Inequalities - Definition & Examples

Spider Man is preparing for another day of heroic adventures. He has on his agenda to climb up $16$ different buildings in the city. If $x$ is some number greater than $10,$ then all of the buildings in the city are of one of two heights: $x + 4,$ or $2x - 6.$ If Spider Man insists on climbing $16$ different buildings and there are hundreds of buildings of each height, then which function represents the minimum total height Spider-Man must climb?