求X. 5x+2=7x-3 7:3=(5x+1):6.

问题描述:

求X.
5x+2=7x-3
7:3=(5x+1):6.

(1)5x+2=7x-3,
      5x+2-5x=7x-3-5x,
          2+3=2x-3+3,
         5÷2=2x÷2,
            x=2.5;
(2)7:3=(5x+1):6
   3×(5x+1)=7×6,
3×(5x+1)÷3=42÷3,
        5x+1-1=14-1,
         5x÷5=13÷5,
             x=2.6.