2x=99-7x
9x=99
x = 11
2x11 = 22
99-&7*11) = 22
so the number is 11
(b)
A polynomial has the form
± + ....
the only expression fitting this description is : x² + 2x + 7
Answer:
N, which is the increment is 4
x = 7
Step-by-step explanation:
the 2 is doubled so the 3.5 has to be doubled as well