Question

решите уравнения плиз!

Answer 1

a)
$frac{x+8}{2} + frac{3-2x}{5} =3$
$frac{5(x+8)+2(3-2x)}{10} =3$
$frac{5x+40+6-4x}{10} =3$
$frac{x+46}{10} =3$
$x+46=30$
$x=30-46$
$x=-16$
==============
б)
$frac{x-3}{2} + frac{2x-4}{3} =-1$
$frac{3(x-3)+2(2x-4)}{6} =-1$
$frac{3x-9+4x-8}{6} =-1$
$frac{7x-17}{6} =-1$
$7x-17=-6$
$7x=11$
$x=11:7$
$x=1 frac{4}{7}$
==========
в)
$frac{3x-1}{5} - frac{x+2}{3} =1$
$frac{3(3x-1)-5(x+2)}{15} =1$
$frac{9x-3-5x-10}{15} =1$
$frac{4x-13}{15} =1$
$4x-13=15$
$4x=28$
$x=7$
==========
г)
$frac{4x-3}{4} + frac{1-x}{3} =-2$
$frac{3(4x-3)+4(1-x)}{12} =-2$
$frac{12x-9+4-4x}{12} =-2$
$frac{8x-5}{12} =-2$
$8x-5=-24$
$8x=-24+5$
$8x=-19$
$x=-19:8$
$x=-2 frac{3}{8}$