
Home > MC1 > Chapter 10 > Lesson 10.1.2 > Problem 10-25
10-25.
If 4k + 1 = −7, then 4k = −8.
Why does this make sense?
If 4k = −8, what must k be equal to?
Try setting up a diagram to figure it out.
k = −2
What do you need to subtract from 30 to get 10?
How can you use this to help figure out the value of x?