x = 7
If x=4 then 2x+7 =
3
33
Y = x - 7
9 plus 7 equals 144. Generally, x plus y = x(x+y).
2x + 7 = x + 3 x + 7 = 3 x = -4
y=(7-x)/4
4
x=7 3/4
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.
-4x +5x +4 =7 x + 4 = 7 x = 3