x^2 + 3x +7 = 0 doesn't factor neatly. Applying the quadratic equation, we find two imaginary solutions: (-3 plus or minus the square root of -19) divided by 2
x = -1.5 + 2.179449471770337i
x = -1.5 - 2.179449471770337i
where i is the square root of negative 1
If: 4x = x+15 Then: x = 5
(0, 6.5) is one option.
7
If: 5x+2y = 9 Then: y = -2.5x+4.5 in slope intercept form
The solution consists of the infinite number of points on the line which is defined by y + x = 6.
X=2
There is no solution since the equation is inconsistent.
x = 0 and y = 4
The equation does not have a solution.
-5
Without an indication of the equals sign, this is not an equation.
Not sure what you mean; that equation certainly has a solution.
-2x plus 3y equals 1
It is a linear equation in x. The equation has the solution x = 0.
x = 19
One equation with two unknowns usually does not have a solution.
This is not a solution because of the following procedure shown below: y+1.1=4y-21.2 22.3=3y y=7.4333 Therefore, y=7.1 is not a solution for this equation.