giải phương trình $14$ $\frac{1}{2}-$ $\frac{2(x+3)}{5}=$ $\frac{3x}{2}-$ $\frac{2.(x-7 )}{3}$
2 câu trả lời
`14 1/2-(2(x+3))/5=(3x)/2-(2(x-7))/3`
`=>29/2-(2x+6)/5=(3x)/2-(2x-14)/3`
`=>(435)/30-(6(2x+6))/30=(45x)/30-(10(2x-14))/30`
`=>435-(12x+36)=45x-(20x-140)`
`<=>435-12x-36=45x-20x+140`
`<=>399-12x=25x+140`
`<=>-12x-25x=140-399`
`<=>-37x=-259`
`<=>x=7`
Vậy `S={7}.`