Question 208087
1: 510(x+70)/(x+55)(x+70) + 230(x+55)/(x+55)(x+70)

2: 510(x+70)+230(x+55)/(x+55)(x+70)

3: (510x+35,700)+(230x+12,650)/(x+55)(x+70)

4: 740x+48,350/(x+55)(x+70)

5: 10(74x+4,835)/(x+55)(x+70)

6: replace x with t(0) 10(74(0)+4,835)/(0+55)(0+70)

7: 10*4,835/3,850=48,350/3,850=12.558 ROUNDING UP TO 13.