X + 42 = 83 - 2X + 42 = 5X = 56 - 4X = 14
x : 9 = 600 : 10x/9 = x = 9 * x = 54
28/x = 400/1028/x = x = 28 / x = 7
X - (25 + 19) = 3X - 44 = 3X = 36 + 4X = 80
X + 42 = 83 - 2
X + 42 = 5
X = 56 - 4
X = 14
x : 9 = 600 : 10
x/9 =
x = 9 *
x = 54
28/x = 400/10
28/x =
x = 28 /
x = 7
X - (25 + 19) = 3
X - 44 = 3
X = 36 + 4
X = 80