1. What is the value of a?
-2(a - 8) + 6a = 36
Remember to follow PEMDAS. First, distribute -2 to all terms within the parenthesis
-2(a - 8) = -2a + 16
-2a + 16 + 6a = 36
Simplify. Combine like terms
6a - 2a = 4a
4a + 16 = 36
Isolate the a. Do the opposite of PEMDAS. First, note the equal sign. What you do to one side, you do to the other.
Subtract 16 from both sides
4a + 16 (-16) = 36 (-16)
4a = 36 - 16
4a = 20
Divide 4 from both sides
4a/4 = 20/4
a = 20/4
a = 5
5 is your answer for a
-------------------------------------------------------------------------------------------------------------------
2. What is the value of n in (3n + 6)/3 = 15
Remember to do the opposite of PEMDAS. Note the equal sign. First, multiply 3 to both sides
(3n + 6)/3(3) = 15(3)
3n + 6 = 45
Next, subtract 6 from both sides
3n + 6 (-6) = 45 (-6)
3n = 45 - 6
3n = 39
Finally, isolate the n. Divide 3 from both sides
3n/3 = 39/3
n = 39/3
n = 13
13 is your answer for n
-------------------------------------------------------------------------------------------------------------------
hope this helps
