Part 1: The answer is 136 - (58n) = -70 because n represents the unknown number. Then you take the unknown number and multiply by 58 and subtract from 136.
Part B: If the answer is -70 the value of x should equal 103/29.
Also, a good calculator to use is the one on mathpapa.com because it shows the steps on how to get the answers to most problems. Hope this helped and let me know if you need any more help! ;)
