Question

resolva as expressões indicadas ​

Answer 1

Explicação passo-a-passo:

a)

A + B = x + y + 5x - 4

A + B = x + 5x + y - 4

A + B = 6x + y - 4

b)

B - C = 5x - 4 - (7 - 8x)

B - C = 5x - 4 - 7 + 8x

B - C = 5x + 8x - 4 - 7

B - C = 13x - 11

c)

C - A = 7 - 8x - (x + y)

C - A = 7 - 8x - x - y

C - A = -9x - y + 7

d)

A + B + C = x + y + 5x - 4 + 7 - 8x

A + B + C = x + 5x - 8x + y - 4 + 7

A + B + C = 6x - 8x + y + 3

A + B + C = -2x + y + 3