Question

解方程80%x+x=3.6&nb

解方程80%x+x=3.6 34x-5%x=17.5．

Answer 1

①80%x+x=3.6
        1.8x=3.6
   1.8x÷1.8=3.6÷1.8
           x=2
  ②

3

4

x-5%x=17.5
0.75x-0.05x=17.5
       0.7x=17.5
  0.7x÷0.7=17.5÷0.7
          x=25