Question

Jason solved the following equation to find the value for x.

–8.5x – 3.5x = –78
x = 6.5
Describe how Jason can check his answer.

Answer 1

By substituting all X's in the situation for 6.5

If the answer equals out to the given answer, then he knows he is correct.

Explanation:

-8.5(6.5) - 3.5(6.5) = -78

Jason is correct.

Answer 2

Jason can plug what x equals (6.5) back into the equation everywhere x is and solve! If the answers on both sides equal each other (example 3=3) then that means his answer is correct.

Explanation:

Facts and math.