you will have 8 tables so
72 chair / 8 tables = 9 chair per table
I believe it’s true not 100% sure
Since x is the length, then x+7 has to be the width.
The area of a rectangle can be found via the formula :
A = length * width
So if we replace the area with the given number (170) and the length, and width, with what we assumed, we get..
170 = x * (x+7)
[which is.. ]
170 = x^2 +7x
0 = x^2 +7x - 170
And that is the answer.
-5m = 4 - 6m....add 6m to both sides
6m - 5m = 4
m = 4 <==