8x +9 = 6x + 21 where x = number of chairs in each row
2x=12
x=6
sub back into original equation 8 x 6 + 9 =57 chairs
Just by adding both of these, pens and also pencils, these actually both signify the same word, "pencils".
We do . . . .
(
93) <em>should </em>be your correct answer!
Let
x--------> the number of children
y------> the number of teenagers
z------> the number of adults
we know that
------> equation A
-----> equation B
-------> equation C
Substitute equation C in equation A and equation B
--------> equation D
--------> equation E
Multiply equation E by
--------> equation F
Adds equation D and equation F
therefore
<u>the answer is the option</u>
Answer:
8 times 5 on each side
Step-by-step explanation: