Question

ayudaaa es para un trabajo importantísimo​

Answer 1

Respuesta:

$3(3x + 6) - 2 = 4(2x - 3) \\ 9x + 18 - 2 = 8x - 12 \\ x = - 28$

$\sqrt{7x + 4} \div 3 - 5 = - 2 \\ \sqrt{7x + 4} \div 3 = 3 \\ \sqrt{7x + 4} = 9 \\ 7x + 4 = {9}^{2} \\ 7x = 85 \\ x = \frac{85}{7}$

$4x + 8 < 2(3x + 4) \\ 4x + 8 < 6x + 8 \\ 0 < 2x \\ 0 < x$

C.S: (0 , +∞)

$7x - 2(x + 1) > 2(2x + 1) \\ 7x - 2x - 2 > 4x + 2 \\ x > 4$

(4 , +∞)

$(3x + 5) + (2x + 45) + (9x - 10) = 180 \\ 14x + 40 = 180 \\ 14x = 140 \\ x = 10$

a = 35

b = 65

c = 80