8x-10=x+11

Question

Solve and justify one variable equation 

Answer 1

8x-10 = x+11

 

Add 10 to both sides of the equation:

 

8x - 10 + 10 = x + 11 + 10

8x = x + 21

 

Subtract x from both sides:

 

8x - x = x - x + 21

7x = 21

 

Divide both sides by 7:

 

7x/7 = 21/7

 

x = 3