4/7 is subtracted from a positive number and the result is multiplied by 7 to obtain the original number. what is the number?

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Icould really use some with this question.

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.