英文數學問題4題

express y as a function of x
1. y=3xy+5

solve each equation or inequality
2. x+3x=4x
3. x-0.04(x-10)=96.4

4. the perimeter of a rectangle is 84 meters. if the width is 16 meters less than the length, then what is the width of the rectangle?
2 answers 2