Solution - Linear equations with one unknown

Step by step solution :

Step  1  :

Pulling out like terms :

 1.1     Pull out like factors :

   -12t - 15  =   -3 • (4t + 5) 

Equation at the end of step  1  :

Step  2  :

Equations which are never true :

 2.1      Solve :    -3   =  0

This equation has no solution.
A a non-zero constant never equals zero.

Solving a Single Variable Equation :

 2.2      Solve  :    4t+5 = 0 

 Subtract  5  from both sides of the equation : 
                      4t = -5
Divide both sides of the equation by 4:
                     t = -5/4 = -1.250

One solution was found :