Question

What is the solution of the equation: 7 + 2/5 x = 1

answer choices
-15
-6
-3
15

Answer 1

x = -15

Explanation:

7 + (2/5)x = 1

First, divide two by five to get 0.4, then substitute in the choices given (remembering that you must also add seven afterward).

0.4*-15 = -6 -6 + 7 = 1 = 1

And there you have it!

*It is important to double check your answer by testing other numbers as well.