Esprimi con termini o formule le seguenti descrizioni:
A: x increased by twice y
B: the quotient of x and the sum of y and 100
C: half of x increased by the product of 25 and y
D: two-thirds the sum of x and three-sevenths of y
E: the quotient of x and 10 minus four times their sum
F: 60 diminished by one-third the product of 7 and x
G: x equals y-square
H: the difference between ten times x and one-half of x is exactly the same as nine and one-half times x
K: if the square root of 9 is subtracted from the cube root of 27 the risult is 0
J: the reciprocal of the ratio of x to y is the ratio of y to x

A:   x + 2·y
B:   x / (y + 100)
C:   x/2 + 25·y
D:   2/3·(x + 3/7·y)
E:   x/10 + 4·(x+10)
F:   60 − 7·x/3
G:   x = y²
H:   10·x − x/2 = 9.5·x
K:   ³√27 − √9 = 0
J:   1/(x/y) = y/x