Question

how do I solve 6x + 3=18

Answer 1

First you subtract 3 from both sides, so:
6x+3=18
-3. -3
6x=15
Then divide both sides by 6:
x=2.5
Hope this helps!

Answer 2

6*x+3-(18)=0 
6x - 15  =   3 • (2x - 5)
Solve  :    2x-5 = 0 Solve :    3   =  0
dd  5  to both sides of the equation : 
                      2x = 5 
Divide both sides of the equation by 2:
                     x = 5/2 = 2.500 
hope that helps!!!