The answer for your question is a
Systems of Linear Equations with Infinitely Many Solutions
500.
Solution: 210 is 42% of X
Equation: Y = P% * X
Solving our equation for X
X = Y/P%
X = 210/42%
Converting percent to decimal:
p = 42%/100 = 0.42
X = 210/0.42
X = 500
It is 54 for 1 and 2 is 2520 you multply the lenght by the whith and divide by 2
