+73 1. Twice the sum of four and a number is 6 less than that same number. What is the number? Let x = the number.
2. Three years from now, Alexandra will be triple her age from seven years ago. How old is Alexandra? Let k = Alexandra's age.
+12531 2(4+x)+6 = x
8+2x +6 =x | -x
x+14 =0
x = -14
x+3 = 3x-7 |-3
x = 3x-10 |-3x
-2x = -10 | : (-2)
x = 5
