Answer:

Explanation:
Equation:





<h3>

General form: ax + by + c = 0</h3>
Explanation:
"Five times" means
5
(
...
)
,
"the sum of a number, say
x
, and
−
3
", means"{(x+(-3)}=(x-3)#.
Taking all these together, the reqd. Algebraic Expression turns out to be
5
(
x
−
3
)
.
Answer: it should be 136 square centimetres
Explanation:
4x - 8 = 3x + 12
x - 8 = 12
x= 20