Which equation can be solved using only natural numbers

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

32a³b² 8ab² simplify the following expression.

Graph a triangle (xyz) and reflect it over the line y=x to create triangle x’y’z’. describe the transformation using words. draw a line segment from point x to the reflecting line, and then draw a line segment from point x’ to the reflecting line. what do you notice about the two line segments you drew? do you think you would see the same characteristics if you drew the line segment connecting y with the reflecting line and then y’ with the reflecting line? how do you know?