Question

O valor de x:


O valor de y:


O valor de x + y:


O valor de x - y:


Me ajudem por favor

Answer 1

$x=(-\frac{6}{15})-\frac{11}{10}=-\frac{6}{15}-\frac{11}{10}=-\frac{12}{30}-\frac{33}{30}=-\frac{45}{30}=-\frac{3}{2}$

$y=(+\frac{7}{8})- (+\frac{3}{10})=\frac{7}{8}-\frac{3}{10}=\frac{35}{40}-\frac{12}{40}=\frac{23}{40}$

$x+y=-\frac{3}{2}+\frac{23}{40}=-\frac{60}{40}+\frac{23}{40}=-\frac{37}{40}$

$x-y=-\frac{3}{2}-\frac{23}{40}=-\frac{60}{40}-\frac{23}{40}=-\frac{83}{40}$