Помоги мне решить уравнения с 2 по 20

Конечно, давай решим эти уравнения вместе! Я покажу тебе, как найти неизвестные значения. 2. $133 - (x + 73) = 43$ $133 - x - 73 = 43$ $60 - x = 43$ $-x = 43 - 60$ $-x = -17$ $x = 17$ 3. $145 - (45 + x) = 55$ $145 - 45 - x = 55$ $100 - x = 55$ $-x = 55 - 100$ $-x = -45$ $x = 45$ 4. $(39 + x) - 27 = 23$ $39 + x - 27 = 23$ $12 + x = 23$ $x = 23 - 12$ $x = 11$ 5. $6 \cdot x + 131 = 437$ $6x = 437 - 131$ $6x = 306$ $x = \frac{306}{6}$ $x = 51$ 6. $238 + x : 8 = 265$ $238 + \frac{x}{8} = 265$ $\frac{x}{8} = 265 - 238$ $\frac{x}{8} = 27$ $x = 27 \cdot 8$ $x = 216$ 7. $490 - y \cdot 7 = 350$ $490 - 7y = 350$ $-7y = 350 - 490$ $-7y = -140$ $y = \frac{-140}{-7}$ $y = 20$ 8. $x \cdot 9 - 754 = 155$ $9x - 754 = 155$ $9x = 155 + 754$ $9x = 909$ $x = \frac{909}{9}$ $x = 101$ 9. $k : 16 - 109 = 231$ $\frac{k}{16} - 109 = 231$ $\frac{k}{16} = 231 + 109$ $\frac{k}{16} = 340$ $k = 340 \cdot 16$ $k = 5440$ 10. $67 - 36 : x = 55$ $67 - \frac{36}{x} = 55$ $- \frac{36}{x} = 55 - 67$ $- \frac{36}{x} = -12$ $\frac{36}{x} = 12$ $36 = 12x$ $x = \frac{36}{12}$ $x = 3$ 11. $8 \cdot (x - 7) = 1080$ $8(x - 7) = 1080$ $8x - 56 = 1080$ $8x = 1080 + 56$ $8x = 1136$ $x = \frac{1136}{8}$ $x = 142$ 12. $(k + 11) : 23 = 27$ $\frac{k + 11}{23} = 27$ $k + 11 = 27 \cdot 23$ $k + 11 = 621$ $k = 621 - 11$ $k = 610$ 13. $900 : (210 + x) = 36$ $\frac{900}{210 + x} = 36$ $900 = 36(210 + x)$ $900 = 7560 + 36x$ $-36x = 7560 - 900$ $-36x = 6660$ $x = \frac{6660}{-36}$ $x = -185$ 14. $124 : (3x + 4) = 4$ $\frac{124}{3x + 4} = 4$ $124 = 4(3x + 4)$ $124 = 12x + 16$ $-12x = 16 - 124$ $-12x = -108$ $x = \frac{-108}{-12}$ $x = 9$ 15. $63 : (2 \cdot x - 1) = 7$ $\frac{63}{2x - 1} = 7$ $63 = 7(2x - 1)$ $63 = 14x - 7$ $-14x = -7 - 63$ $-14x = -70$ $x = \frac{-70}{-14}$ $x = 5$ 16. $248 : (41 - 2 \cdot x) = 8$ $\frac{248}{41 - 2x} = 8$ $248 = 8(41 - 2x)$ $248 = 328 - 16x$ $16x = 328 - 248$ $16x = 80$ $x = \frac{80}{16}$ $x = 5$ 17. $18 \cdot (7 \cdot x + 26) = 1854$ $18(7x + 26) = 1854$ $126x + 468 = 1854$ $126x = 1854 - 468$ $126x = 1386$ $x = \frac{1386}{126}$ $x = 11$ 18. $(5x + 1) : 16 = 6$ $\frac{5x + 1}{16} = 6$ $5x + 1 = 6 \cdot 16$ $5x + 1 = 96$ $5x = 96 - 1$ $5x = 95$ $x = \frac{95}{5}$ $x = 19$ 19. $(483 - 8 \cdot x) : 43 = 9$ $\frac{483 - 8x}{43} = 9$ $483 - 8x = 9 \cdot 43$ $483 - 8x = 387$ $-8x = 387 - 483$ $-8x = -96$ $x = \frac{-96}{-8}$ $x = 12$ 20. $21 \cdot (5 \cdot x + 14) = 2499$ $21(5x + 14) = 2499$ $105x + 294 = 2499$ $105x = 2499 - 294$ $105x = 2205$ $x = \frac{2205}{105}$ $x = 21$ Вот и все решения! Если тебе что-то непонятно, не стесняйся спрашивать!