Question

Atividade 1- Efetue :
a) ( + 7x ) + ( - 3x )=
b) ( - 8x ) + ( + 11 x )=
c) ( - 2y ) + ( - 3y ) =
d) ( - 2m ) + ( - m ) =
e) ( - 72 x ) + ( + 14 x )=
f) ( + 8x ) - ( - 3x )=
g) ( - 6y ) - ( - y )=
h) ( - 5x ) - ( - 11x )=
i) ( + 7y ) - ( +7y )=

Answer 1

Resposta:

a-(-7x)+(-3x) = -7x -3x = -10x

b- (-8x)+(+11x) = -8x +11x = +3x

c- (-2y)+(-3y). = -2y - 3y = -5y

d- (-2m)+(-m) = -2m -m = -3m

e- (-72x)+(+14x)= -72x +14x = -58x

f- (+8x)-(-3x) = +8x + 3x = 11x

g-(-6y)-(-y) = -6y +y = -5y

h-(-5x)-(-11x) = -5y +11y = 6y

i- (+7y)-(+7y) = +7y - 7y = 0