If I understand this, you have the equation 6(2x+7)-5. This is equal to 12x+37. Hope this helps.
You would multiply 4 by 72 then u multiply 4 * -6 then after that you would add 15
6. 7/3
8. 7/3
please don't get mad if these answers are wrong
3.50m+75 for the 30 miles, he is being paid 105 plus the daily amount of 75 which equals to 180$.