Question

For m(x)=-2x+7, find the value of x for which m(x)=13

Answer 1

The answer is x= -3




The explanation if you need it is since m(x)=13 we get the equation 13=-2x+7. Then we use the equation to find x.


13= -2x+7
-7 -7
6= -2x
— —
-2 -2

-3=x

You then want to check your answer by substituting -3 for x

13= -2(-3) +7
13= 6+7
13=13
If your answers match then your answer is correct

Answer 2

x = -3

Explanation:

m(x) = -2x + 7

13 = -2x + 7

6 = -2x

x = -3