Answer:
The letter "x" is often used in algebra to mean a value that is not yet known.
It is called a "variable" or sometimes an "unknown".
But in some cases, x can be equal to 1 like example when working with exponents.
Step-by-step explanation:
Answer:
90
Step-by-step explanation:
100-10=90
Answer:c=3200
Step-by-step explanation:
2800+c<=6000
2800-2800+c<=6000-2800
c=3200