twice the square root of a number increased by 5 is 23
The phrase a number means an arbitrary variable, let's call it x:
x
The square root of a number means we raise x to the 1/2 power:
sqrt(x)
the square root of a number increased by 5 means we add 5 to sqrt(x):
sqrt(x) + 5
twice the square root of a number increased by 5 means we multiply sqrt(x) + 5 by 2:
2(sqrt(x) + 5)
The phrase is 23 means we set 2(sqrt(x) + 5) equal to 23:
2(sqrt(x) + 5) = 23
The phrase a number means an arbitrary variable, let's call it x:
x
The square root of a number means we raise x to the 1/2 power:
sqrt(x)
the square root of a number increased by 5 means we add 5 to sqrt(x):
sqrt(x) + 5
twice the square root of a number increased by 5 means we multiply sqrt(x) + 5 by 2:
2(sqrt(x) + 5)
The phrase is 23 means we set 2(sqrt(x) + 5) equal to 23:
2(sqrt(x) + 5) = 23