Question 894542
Q:
The sum of 38 and twice a number is 124 find the number 
A:
The first equation 38 + 2n = 124 is correct.
You change the sign of the number when you transpose it.
The second equation should be
2n = 124 - 38
2n = 86
Divide both sides by 2.
{{{highlight(n = 43)}}}