Let's solve your equation step-by-step. 3 x + 1 = 3 x Step 1: Subtract 3x from both sides. 3 x + 1 − 3 x = 3 x − 3 x 1 = 0 Step 2: Subtract 1 from both sides. 1 − 1 = 0 − 1 0 = − 1
No. Writing it as a biconditional would mean that "If a number is odd, then it is a prime number" is also true. The original statement is true, but the converse is false.