Answer:
12t
7a
Step-by-step explanation: Factoring/Multiplication Factors and PEMDAS "Please Excuse My Dear Aunt Sally"
1. 3x4 = 12t or 3x3x3x3 = 12t
*the variable "t" is carried to the final answer because "3" has no variable.
2. 8a-3a = 5a, 5a+2a = 7a
The Order of Operations: PEMDAS "Please Excuse My Dear Aunt Sally"
The "operations" are addition, subtraction, multiplication, division, exponentiation, and grouping; the "order" of these operations states which operations take priority (completed first) before which other operations.
Parentheses (simplify inside 'em)
Exponents
Multiplication and Division (from left to right)
Addition and Subtraction (from left to right)
**Grouping requires you to take like variables and/or symbols, ex: “a, t, x” and do those the same as the numbers
When you have a lot of operations of the same type, you just do them from left to right.