x+3 = 20 x = 20-3 x = 17
9 plus 7 equals 144. Generally, x plus y = x(x+y).
3x + 11 = x + 3 2x = -8 x = -4
21
2 squared plus 2 x 3 = 10, 7 squared plus 7 x 2 = 63, 6 squared plus 6 x 5 = 66,8 squared plus 8 x 4 = 96 so 9 squared plus 9 x 7 = 81 + 63 = 144.
x = 0
x equals 8
9
x equals 4
12!
(0, -3)
(3, 5)
12x = x + 3 11x = 3 x = 3/11
x + 3 = 2x 3 = x x cannot be 2
Symmetric Property of Addition
it equals 3.
6