If 7 times a number is equal to 7 plus that number, which of the following represents the equation needed to determine what that number is? a) x+7x=7 b) 7x=7 c) 7+x=7 d)7x=x+7 e) 7(x+1)=7

The correct answer is D) 7x = x + 7

This is because the question refers to the left side of the equation containing “seven times a number”. We assume that this unknown number is represented by the variable x and is multiplied by 7 as represented by the coefficient. This is equal to the right side of the equation, where 7 is added to the same number. This lets us know we are still using the variable x, and we must add 7 to this value. Therefore, the correct answer is option D.

Hope this helps!

step-by-step explanation:

the true ones are a b and d