4x + 69 = 30 + 5x
Separate the variables and constants (subtract 4x from each side):
69 = 30 + x
Subtract 30 from each side (your variable is already a unit) :
39 = x
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many solutions
By using the quadratic equation formula: x = -5 and x = 3
-4x+3 = 23+6x -4x-6x = 23-3 -10x = 20 x = -2
You cannot solve one linear equation with two variables.
subtracting gives 4x = -12 so x = -3