7x + 4 = 2x + 5
Subtract 4 from each side of the equation:
7x = 2x + 1
Subtract 2x from each side:
5x = 1
Divide each side by 5:
x = 1/5 = 0.2
x=2, 3, 4...
7
Y^2 = 125 Y = +/- sqrt(125) Y = +/- 5sqrt(5)
3x - 5 = 48 So 3x = 53 and x = 53/3 = 17.66...
X2 - 3X - 4 = 0factored(X + 1)(X - 4)----------------X = - 1X = 4-------------------(- 1, 0) and (4, 0)================solution set of X interception points
the empty set.
No.
(0, -14)
Solution: x = 1/4 and x = -3.
The solution: x = 6/7 and x = -1
{-1,7}
6x = 1 x = 1/6
They are: x = 5/3 and x = -3
It is: x = 5/3 and x = -3
-5x + x + 9 = -4x + 12 -4x + 9 = -4x + 12 9 = 12 This equation has no solution.
x2 + 49 = 0 ∴ x2 = -49 ∴ x = 7i
-4