algebra
posted by Mat on .
how do i figure this out step by step?
3x7=5x+13

Start out by writing out the equation again.
3x7=5x+13
Bring all variables and constants to either sides of the equation.
3x7=5x+13
2x=20
Finally, solve for x.
2x=20
x=10 
The goal of the problem is to get the x by itself and figure out what x is. The first thing you should do is work with the whole numbers 7 and 13.
3x7=5x+13
add 7 to both sides. By adding 7 to both sides you are not changing the equation but equaling it out. the new equation should be
3x=5x+20
Now subtract 5x from each side
your new equation should be
2x=20
divide each side by 2
2x/2=20/2
x= 10 
Thanks Emily Teacher!