Respuesta :

renknee

Answer:

23: y = -0.4

24: b = -1.8

25: m = 1/2

26: g = 1/4

27: s = 3/2

28: w = -12/5

29: z = 5/4

30: a = -9/5

Step-by-step explanation:

23:

  • [tex]3y + 5.2 = -5y + 2[/tex]
  • [tex]3y+5.2+5y=-5y+2+5y[/tex]
  • [tex]8y + 5.2 = 2[/tex]
  • [tex]8y+5.2-5.2=2-5.2[/tex]
  • [tex]8y = -3.2[/tex]
  • [tex]\frac{8y}{8} = \frac{-3.2}{8}[/tex]
  • [tex]y = -0.4[/tex]

24:

  • [tex]10b-2=7b-7.4[/tex]
  • [tex]10b-2-7b=7b-7.4-7b[/tex]
  • [tex]3b - 2 = -7.4[/tex]
  • [tex]3b -2 + 2 = -7.4 + 2[/tex]
  • [tex]3b = -5.4[/tex]
  • [tex]\frac{3b}{3} = \frac{-5.4}{3}[/tex]
  • [tex]b = -1.8[/tex]

25:

  • [tex]2m - 2 = 6m - 4[/tex]
  • [tex]2m-2-6m=6m-4-6m[/tex]
  • [tex]-4m-2=-4[/tex]
  • [tex]-4m-2+2=-4+2[/tex]
  • [tex]-4m = -2[/tex]
  • [tex]\frac{-4m}{-4} = \frac{-2}{-4}[/tex]
  • [tex]m = \frac{1}{2}[/tex]

26:  

  • [tex]3g+5=7g+4[/tex]
  • [tex]3g+5-7g=7g+4-7g[/tex]
  • [tex]-4g+5=4[/tex]
  • [tex]-4g + 5 - 5 = 4-5[/tex]
  • [tex]-4g = -1[/tex]
  • [tex]\frac{-4g}{-4} = \frac{-1}{-4}[/tex]
  • [tex]g = \frac{1}{4}[/tex]

27:

  • [tex]4s-1=-2s+8[/tex]
  • [tex]4s-1+2s=-2s+8+2s[/tex]
  • [tex]6s - 1 = 8[/tex]
  • [tex]6s - 1 + 1 = 8+1[/tex]
  • [tex]6s = 9[/tex]
  • [tex]\frac{6s}{6} = \frac{9}{6}[/tex]
  • [tex]s = \frac{3}{2}[/tex]

28:

  • [tex]9w+3=4w-9[/tex]
  • [tex]9w+3-4w=4w-9-4w[/tex]
  • [tex]5w + 3=-9[/tex]
  • [tex]5w + 3 - 3 = -9-3[/tex]
  • [tex]5w = -12[/tex]
  • [tex]\frac{5w}{5} = \frac{-12}{5}[/tex]
  • [tex]w = \frac{-12}{5}[/tex]

29:

  • [tex]6z-7=2z-2[/tex]
  • [tex]6z-7-2z=2z-2-2z[/tex]
  • [tex]4z -7 = -2[/tex]
  • [tex]4z-7+7=-2+7[/tex]
  • [tex]4z = 5[/tex]
  • [tex]\frac{4z}{4} = \frac{5}{4}[/tex]
  • [tex]z = \frac{5}{4}[/tex]

30:

  • [tex]-a+3=4a+12[/tex]
  • [tex]-a+3-4a=4a+12-4a[/tex]
  • [tex]-5a+3=12[/tex]
  • [tex]-5a + 3 - 3 = 12-3[/tex]
  • [tex]-5a = 9[/tex]
  • [tex]\frac{-5a}{-5} = \frac{9}{-5}[/tex]
  • [tex]a = -\frac{9}{5}[/tex]

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