Question

Simplifique as seguintes expressões:

A)2×-3×+×-8×
B)2a+b-3a+4b+5
C)-6x+7y-(-4x)+(-7y)

Answer 1

A)

2x-3x+x-8x

=5x+x-8x

=6x-8x

=-2x

B)

2a+b-3a+4b+5

=a+5b+5

C)

-6x+7y-(-4x)+(-7y)

=-6x+7y+4x-7y

=-2x