Answer: 2x-y=15
Step-by-step explanation: can u be more detailin
A + s = 279
s = 2a
a + 2a = 279
3a = 279
a = 279/3
a = 93 <=== adult
s = 2a
s = 2(93)
s = 186 ....students
Answer:
its 698...............................
The double implication "if and only if" is graphically represented by an arrow pointing in both direction, so the correct writing is
