Question

133 Dados os números:
x = 1 - [4 + (4 - 2-5)-(-7 + 3)] ey = 2 - [7 - (-1 – 3 + 6) - 8), calcule:
a) x+y
b)x -Y
C)Y-X​

Answer 1

x=1-[4+(4-2-5)-(-7+3)] =1-[4-3+4]=-4

$\color{blue}{x=-4}$

y=2-[7-(-1-3+6)-8]=2-[7-2-8]=2+3=5

$\color{red}{y=5}$

a)

$\color{blue}{x}+\color{red}{y}\\=\color{blue}{-4}+\color{red}{5}\color{dodgerblue}{=+1}$

b)

$\color{blue}{x}-\color{red}{y}\\=\color{blue}{-4}-\color{red}{5}\color{dodgerblue}{=-9}$

c)

$\color{blue}{y}-\color{red}{x}=-(\color{blue}{x}-\color{red}{y})=-\color{dodgerblue}{(-9)}=9$