Question

What belongs in the box marked with the question mark in the proof?

Given: 4x + 1 = 6x - 2, Prove: x = 3/2
Statement

(1) 4x + 1 = 6x - 2



(2) 4x + 3 = 6x



(3) 3 = 2x



(4) 3/2 = x

?

(5) x = 3/2

Answer 1

Start with the given 4x + 1 = 6x - 2.

Combining like terms, we get 3 = 2x, from which we later get x = 3/2.

Where the question mark appears, write, "Reverse the order of 3/2 = x to obtain x = 3/2."