Solving
an equation means finding a value of a variable that make the equation true.
This value is called the solution of the equation. A mathematical equation is
just like a balanced equation. Both sides of the equation should be equal at
all times. Whatever we do to one side, has to be done on the opposite side.
\(300-50x=150+20x\)
\(300=150+20x+50x\) \(Add \ 50x \ to \ both \ sides\)
\(300=150+70x\)
\(300-150=70x\) \(Subtract \ 150 \ from \ both \ sides\)
\(150=70x\)
\(\dfrac{150}{70}=x\) \(Divide \ both \ sides \ by \ 70\)
\(x= \dfrac{15}{7}\)
