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erastovalidia [21]
3 years ago
7

0.3d-1/3 1/3=.84:7/15

Mathematics
2 answers:
telo118 [61]3 years ago
4 0

Answer:

d=\frac{147}{6.3}

Step-by-step explanation:

  • The right side is a ratio 0.84:\frac{7}{15}
  • a ratio can be written as a fraction \frac{0.84}{\frac{7}{15} } this means 0.84 divide by \frac{7}{15} which is the same as 0.84*\frac{15}{7}=\frac{12.6}{7}
  • On the left, change the mixed fraction 3\frac{1}{3} to the improper fraction \frac{10}{3}
  • Then divide 0.3d-1 by \frac{10}{3} which is same as (0.3d-1)*\frac{3}{10} =\frac{3(0.3d-1)}{10}
  • So the equation is now \frac{3(0.3d-1)}{10}=\frac{12.6}{7}
  • Now multiply both sides by 10 and 7:
  • (10)*(7)*\frac{3(0.3d-1)}{10}=\frac{12.6}{7}*(7)*(10)\\7*3(0.3d-1)=12.6*(10)\\21*(0.3d-1)=126\\6.3d-21=126\\6.3d-21+(21)=126+(21)\\6.3d=147\\d=\frac{147}{6.3}
rewona [7]3 years ago
3 0

Answer:

d=147/6.3

Step-by-step explanation:

d = 147 / 6.3

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