9 plus 7 equals 144. Generally, x plus y = x(x+y).
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=7 3/4
Answer: x = 8/7
2
x = -2
X=2
x=-2
2x + 7 = x + 3 x + 7 = 3 x = -4
x = 5
(x + 7) + (x - 2) x= -7 or 2
-7