Question

5. Reduza os termos semelhantes:
a) 3x + y - 7+ 4x
b) 5x + 7y-2x +y
c) 2a - 8b + 5c - 6a + 8b
d) 25x - 30y + 10x - 5y
e) 3x - 2y +9-x-10​

Answer 1

a)

$3x + y - 7 + 4x = \\ 7x + y - 7$

b)

$5x + 7y - 2x + y = \\ 5x - 2x + 7y + y = \\ 3x + 8y$

c)

$2a - 8b + 5c - 6a + 8b = \\ 2a - 6a - 8b + 8b + 5c = \\ - 4a + 5c$

d)

$25x - 30y + 10x - 5y = \\ 25x + 10x - 30y - 5y = \\ 35x - 35y$

e)

$3x - 2y + 9 - x - 10 = \\ 3x - x - 2y + 9 - 10 = \\ 2x - 2y - 1$