Answer:
7a+4a
we add same term.
a is common for both.
First take common term out
7a+4a = a(7 + 4) (we add same term.
= 11a
Step-by-step explanation:
Option D
See attached image
Look at the equations:
y
=
−
9
x
21
and
5
+
7
Because both equations equal (y), they both equal the same.
If an equations says "
" , that means we can replace (y) with
.
Therefore when i take the equation:
, we can replace (y) to get:
Now isolate (x):
⇔
14
28
2
around 1 1/8
..............
