3(4x + 1) – 4x + 3 = -18

Step-by-step explanation:

Subtract 3 from both sides:

Expand:

Subtract 3 from both sides:

Divide both sides by 8:

the first one, all those points on the line just make a strait line.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.