A+b+c=180
subsittute
x+25+x-5+c=180
2x+20+c=180
minus 20 both sides
2x+c=160
mius 2x
c=160-2x
If your question is to write it in scientific notation, it's 10^4 and the exponent is 4
Answer:
Real word Problem:- Jean is working in a pizza shop. She has 60 kg of flour. She has used one-fifth of it for making pizzas. How much flour she used for making pizzas?
Solution:- Quantity of flour she has= 60 kg
The quantity she used in making pizzas=

hence, she used 12 kg of flour for making pizzas.
Here the multiplication of a fraction and a whole number
and its answer is between 10 and 15, since 10<12<15.
The answer would be +3 since ur adding 3 every time