Question

Va rog mult sa ma ajutati! Ofer coronița!
6(x+4)+4(x+11)=108
Si inca una va rog mult!
4(6x+6)-4(11+11)=-100
Va rog mult! Dau coroană ​

Answer 1

1)

$6(x + 4) + 4(x + 11) = 108$

$6x + 24 + 4x + 44 = 108$

$10x + 68 = 108$

$10x = 108 - 68$

$10x = 40$

$x = 4$

2)

$4(6x + 6) - 4(11 + 11) = - 100$

$24x + 24 - 4 \times 22 = - 100$

$24x + 24 - 88 = - 100$

$24x - 64 = - 100$

$24x = - 100 + 64$

$24x = - 36$

$x = - \frac{3}{2}$

3)

$4 \times (x + 2) + 2 \times (x - 11) = 22$

$2x \times (x + 2) + x - 11 = 11$

$2x {}^{2} + 4x + x - 11 = 11$

$2x {}^{2} + 5x - 11 = 11$

$2x {}^{2} + 5x - 11 - 11 = 0$

$2x {}^{2} + 5x - 22 = 0$

$x1 = \frac{ - 5 - \sqrt{201} }{4}$

$x2 = \frac{ - 5 + \sqrt{201} }{4}$