Solve for x
6x+3=16
6x=13
x=613
Substitute the value of x into 2x+1.
2(613)+1
313+1
313+33
316
Recognize that 6x+3 is simply 2x+1 tripled. You could also factor to come up with a similar
conclusion.
6x+3=16
3(2x+1)=16
We can simply divide by 3 on both sides to isolate 2x+1.
2x+1=316