Question

Me pueden ayudar con los resultados por favor

Answer 1

1) - x + 19x - 18x = 19x - 18x - x = 19x - 19x = 0

2) 5x - 11y - 9 - 20x - 1 - y = (5x - 20x) + (-11y - y) + (-9 - 1)

= -15x - 12y - 10

3) $\frac{1}{3}xy+\frac{1}{6}xy=\frac{2(xy)+1(xy)}{6} = \frac{3xy}{6} = \frac{1}{2}xy$

4) 0.25a + $\frac{1}{4}a$

0.25a = $\frac{1}{4}a$

$\frac{1}{4}a+\frac{1}{4}a=\frac{2}{4}a=\frac{1}{2}a$

5) 7a - 9b + 6a - 4b = (7a + 6a) + (-9b - 4b) = 13a + (-13b) = 13a - 13b

6) 28a - (35a + 23b) + 45b = 28a - 35a - 23b + 45b = -7a + 22b

7) $\frac{3}{5}ab+\frac{1}{10}ab=\frac{2(3ab)+ab}{10}=\frac{6ab+ab}{10}=\frac{7ab}{10}$

8) 2$2\frac{1}{5}xy+0.4xy+2xy$

$2\frac{1}{5}=\frac{11}{5}$

$0.4xy=\frac{2}{5}xy$

$\frac{11}{5}xy+\frac{2}{5}xy+2xy=\frac{11xy+2xy+10xy}{5}=\frac{23xy}{5}$