x equals 7
The value is 1 if (x, y) = (4, 3) and 0 otherwise.
x=4.
x = 4
4
x= -1
|x + 1| - |x + 4| = 0 ∴ |x + 1| = |x + 4| ∴ x + 1 = -x - 4 ∴ 2x = -5 ∴ x = -5/2
4 x 3 + 1 = 13
4
x = 3 y = 4 2x + y - 1 = (6) + (4) - 1 = 9
x=4
7
It is an equation and the value of x is 1