distribute 7 and 12x which means you multiply 7 and 12. 7 times 12 is 84.
that makes
84X=420, now you have to get the variable alone, so do the inverse property. The opposite of multiplying is dividing, so divide each side by 84 to get the X alone. 420 divided by 84 is 5.
then the equation is simplified to this:
x=5, so the answer is therefore 5. to check just plug in 5 into the x and solve normally, and if you get 420=420 the answer is correct.
