Question

Reduza os termos: a)3×+(-4-6×)+9
b)8×-8-(-3y+5)
c)a-[n+(a+3)]
d)5×-×-[×-(x-x)]

Answer 1

a)
= 3× +( - 4 - 6×) + 9
= 3x - 4 - 6x + 9
= - 3x + 5

b)
= 8×-8-(-3y+5)
= 8x - 8 + 3y - 5
= 8x + 3y - 13

c)
= a-[n+(a+3)]
= a - [n + a + 3]
= a - n - a - 3
= - n - 3

d)
= 5× - × - [× - (x-x)]
= 4x - [x - 0]
= 4x - x
= 3x