Question

Resolva:
(A) 13-2x-15=0
(B) X(2X-1)+6=4(X+1)
(C) 4X ao quadrado +7X+3=2X ao quadrado +2X
(D) X(X-2)=(X+6)

Answer 1

a-

$2x = 15 - 13 \\ 2x = 2 \\ x = \frac{2}{2} \\ x = 1$

b-

$3x - 1 + 6 = 4x \\ 3x - 4x = 1 - 6 \\ x = 5$

c-

$4x {}^{2} + 7x + 3 = 2x \\ 4x + 7x - 2x = 3 \\ 9x = 3 \\ x = 3 - 9 \\ x = 6$

$x + 2x = 6x \\ 9x$