解不等式:4x-3除以5+2x>/3(大于或等于3)
6个回答

4x-3÷5+2x≥3

6x-3/5≥3

6x≥3+3/5

6x≥18/5

x≥18/5乘以1/6

x≥3/5

啊,我把题目搞错了.应该是

(4x-3)/(5+2x)-3≥0

(4x-3)/(5+2x)-3(5+2x)/(5+2x)≥0

(4x-3-15-6x)/(5+2x)≥0

(-2x-18)/(5+2x)≥0

(x+9)/(5+2x)≤0

-9≤x≤-5/2