Question

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21. -(4x-6+5x) + (9-5x+3-2x) = 7x - (1 - 6x)
22. 12y = 3(3y - 5)
23. 3z - 1 = 2(z - 1)
24. 2(b + 2) - 5(2b - 3) = 3
25. 7 - 6(c - 1) + 3(3 - 4c) = 7 + (7c - 4)
26. 4-2(d + 7)-(3d + 5)=2d+(4d-9+3d)-(d - 3)
27. 8(6f - 14)-7(12 - 5f)+(23f + 2)-(2f + 65) = 0
28. 21 - [5g - (3g - 1)] - g = 5g - 12
29. 40h - [24 - (6h + 8) - (5 - 2h )] = 3-(8h - 12)
30. 3[2 - (3j - 6)] + 4[6j - (1 - 2j)] = 4 - 5j
31. 2 - {k - [6k - (1 - 2k)]} = 100
32. 3[2x - (5x + 2)] + 1 = 3x - 9(x -3)
33. 2 - {2m + [2m - (2 - 2m)]} = 2
34. 34 - 52(12n - 34) + 235 = 32 + 101(35n - 1)
35. 2 - (3ñ + 4)-(5ñ - 6 )-(7ñ - 8)-(9ñ - 10) = 11
36. 2[7p - 2(p - 1)] + 3(4p + 7) = 5 - (p - 1)
37. 8{2 - [q + 2(q - 3)] + 1} = 3 - (8 - 3q)
38. 2 - 3(r - 7) - 7r = 4(r - 2) + 8
39. 33,7 - (1,5s + 2,3) = 3,4s - (0,4 - 5,7s)
40. (t - 3)² - (t - 2)² = 5
41. (2v - 4)² + 6v - 3 = 4v² - (3v - 1)
42. (w + 3)² + 4 = (w - 2)² + 5w - 2
43. (3x - 3)² - (2x - 7) = (3x - 5)(3x + 5)
44. 2 - (y + 1)² = 5 - 3[y - (5y + 9)] - y²
45. 6z - 1 + 2z + 5z - 9 - 234 = 999
46. 2{x - [x - (x - 1)]} + (x + 2) = 256
47. (x - 7)² - (1 + x)² = 2(3x - 4)
48. 6x - (2x - 1)(2x + 1) = 2 - (3 + 2x)²
49. 7 - [8x - 3(x + 3)] = 5x - (4 - 2x)
50. 1 - a = 1
51. b/5 = 1/2
52. 2.c/7 = 3/4

Answer 1

la segunda 12y=3(3y-5)
12y= 9y-15
12y-9y=-15
3y=-15
y=-15/3
y=-5