CPM Homework Help : MC1 Problem 9-70

Find the value of the variable that makes each equation true.

$5a - 3 = 17$
Hint (a):
Problem 9-9 is very similar to this one. Go back and look at the work done for that problem, if you are having trouble.
Answer (a):
$a = 4$

$2x +1 = -9$
Hint (b):
Again, this is similar to problem 9-9. Model your solution after the one presented in that problem.