An algebraic expression or mathematical expressions combines numbers and operations.
Answer:
48
Step-by-step explanation:
Step-by-step explanation:
the third of 7 consecutive numbers is 12.
so, this looks like
..., ..., 12, ..., ..., ..., ...
that means the numbers have to be
10, 11, 12, 13, 14, 15, 16
the sum is then
16+10 + 15+11 + 14+12 + 13 = 3×26 + 13 = 91
X=5, for the first one
Y= -9 for the second one