Question

3(2x-6)=7x-3
3(x-4)=5(x-2)
2(2x-4)-11=3(3x+2)
radical din 121-3x=-7x-radical din 81
rog rezolvare
10x+radical din 225 mai mare sau egal cu rad din 64ori x+rad 361
-rad 25ori x+2<6x+rad169

Answer 1

$3(2x - 6) = 7x - 3 \\ 6x - 18 = 7x - 3 \\ x = - 15$

$3(x - 4) = 5(x - 2) \\ 3x - 12 = 5x - 10 \\ 2x = - 2 \\ x = - 1$

$2(2x - 4) - 11 = 3(3x + 2) \\ 4x - 8 - 11 = 9x + 6 \\ 4x - 19 = 9x + 6 \\ 5x = - 25 \\ x = - 5$

$\sqrt{121} - 3x = - 7 x - \sqrt{81} \\ 11 - 3x = - 7x - 9 \\ 7x - 3x = - 9 \times 11 \\ 4x = - 20 \\ x = - 5$

$10x + \sqrt{225} \geqslant \sqrt{64} x + \sqrt{361} \\ 10x + 15 \geqslant 8x + 19 \\ 2x \geqslant 4 \\ x \geqslant 2 \\ x = [2 ;\: + \infty )$

$- \sqrt{25}x + 2 < 6x + \sqrt{169} \\ - 5x + 2 < 6x + 13 \\ 11x > - 11 \\ x > - 1 \\ x = (- 1 ;\: + \infty )$