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.
答
(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.