Why couldn’t Thurber look through a microscope?

Hi

Explanation:

They are lenses designed to enlarge the image of objects located on the microscope stage. The real (and inverted) image they form is magnified by the eyepiece's optical system. Typically a combination of four (x4, x10, x25, x50) or five (x2.5, x5, x10, x25, x50) lenses are used.

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4