Question

Efetue: 

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

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

c). (+5a²) + (-3a²)= 

d). (+2c) – (+5c)=

e). (-6y) – (-y) =

f). (+3xy)-(-xy)+(xy)=

g). (-9y) - (+3y) - (+y) + (-2y)

h). (3c) + (-8c) + (+4c) - (-5c) - (-a)=​

Answer 1

a) 7x + ( - 3x ) = 4x

b) - 8x + 11x = 3x

c) 5a² + ( - 3a² ) = 2a²

d) 2c - ( 5c ) = 2c - 5c = - 3c

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

f) 3xy - ( - xy ) + xy = 3xy + xy + xy = 5xy

g) - 9y - ( 3y ) - ( y ) + ( - 2y ) = - 9y - 3y - y - 2y = - 15y

h) 3c + ( - 8c ) + 4c - ( - 5c ) - a = 3c - 8c + 4c + 5c - a = 4c - a

Espero ter ajudado!