
When there is a - in front of an expression in parentheses, change the sign of each term in the expression to +

Calculate the LCM of denominators

Calculate the difference

<em>9/20+5/12=14/32/2 equals a over all 7/16</em>
Answer:
1. its substitution
2.
3. order of operations
4. variable
5. equation
Step-by-step explanation: