Answer:
1. n=14
2. n=3
Explanation:
What you could do is if it says the sum of whatever and it gives you a number in the equation you can set it up.
#1. So for the first one the sum is (21) and a number it gives you is (7). It says increased and it says sum so that means you add.
7+n=21 *question set up in equation*
-7 -7 *subtract 7 from both sides to isolate n and get you're answer**
n=14
#2. For the 2nd one it says multiplied and product so you will be using multiplication. It gives you the product (27) and a number in the equation (9). To set it up:
9xn=27 *question set up in equation*
9/9 =27/9 *divide 9 by both sides to get answer. You divide bc its the opposite of multiplication**
n=3
For the inverses
If it is addition, subtract
If it is subtraction, add
If it is multiplication, divide
If it is division, multiply
For context clues to set up equation
Sum--> addition
Difference--> subtraction
Quotient--> division
Product--> multiplication
Hope it helps!