Question

a) 3x - 1/7x + 9x + 2/9x

b)1/2 a+ 1/3b + 2a - 3b - 3/4a - 1/6b

c) 1/4xy - 3/5xy + xy

d)1/2m + 2/3m - 3/5m




me podrían ayudar.

Answer 1

a)x( 3-1/7+9+2/9)=761/63x

Answer 2

a.
$3x - \frac{1}{7} x + 9x + \frac{2}{9} x$
$\frac{189x - 9x + 567x + 14x}{63}$
$\frac{761}{63}$
b.
$\frac{1}{2} a + \frac{1}{3} b + 2a - 3b - \frac{3}{4} a - \frac{1}{6} b$
$\frac{1}{2} a + 2a - \frac{3}{4} a + \frac{1}{3} b - 3b - \frac{1}{6} b$
$\frac{7}{4} a - \frac{17}{6} b$
c.
$\frac{1}{4} xy - \frac{3}{5} xy + xy$
$\frac{5xy - 12xy + 20xy}{20}$
$\frac{13}{20} xy$
d.
$\frac{1}{2} m + \frac{2}{3} m - \frac{3}{5} m$
$\frac{15m + 20m - 18m}{30}$
$\frac{17}{30} m$