Question

Solve linear equation x+3+x-8+x=55

Answer 1

x+3+x-8+x= 55
⇒ (x+x+x)+ (3-8)= 55 (combine like terms)
⇒ 3x -5= 55
⇒ 3x= 55+5
⇒ 3x= 60
⇒ x= 60/3
⇒ x= 20

Final answer: x=20~

Answer 2

First you add like terms which means you add all the x's together and all the constants.
3x -5 =55 (Remember that 8 has a negative sign in front which brings that sign with it when combinding like terms)
Then you isolate the variable by adding 5 on both sides.
3x = 60.
Finally you divide by 3 on both sides to get x=20