Answer:
x = -7
How to:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation
5°x-(2°x-9)=0
Pull out like factors:
21 + 3x = 3 • (x + 7)
Equations which are never true: Solve 3 = 0
Solving a Single Variable Equation:
Solve : x+7 = 0
Subtract 7 from both sides of the equation : x = -7