Question

5x -7.(x + 3) > 5 - 3.(x - 8) é:

S = {x e R / x 8}
S = {x e R / x > 50}
S = {x e R / x < 50}
S = {x e R / x < 3}

Answer 1

Resposta:

S = {x e R / x > 50}

5x -7.(x + 3) > 5 - 3.(x - 8)

5x - 7x - 21 > 5 - 3x + 24

-2x + 3x > 29 + 21

x > 50