Add: 5x - y + x + y + 8 + 10 ie 6x = 18 so x = 3 and y = 7
x + y = 10 y = x + 8 so, x + (x + 8) = 10 2x + 8 = 10 2x + 8 - 8 = 10 - 8 2x = 2 x = 1 and y = 9 because y = x + 8 y = 1 + 8 y = 9
-12
x + 10 = 18 18 - 10 = x 18 -10 = 8 x = 8
x=-8
4n-8=3n+2 4n=3n+2+8 4n=3n+10 4n-3n+10 n=10 N = 10
-10 + 8 = -2
Tautology?
2 plus 8 equals 10.
10?
46
273 13+8 = 21 and 13*21 = 273
8 + 2 = 10
(1, 9)
134
26
144
8.