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4 years ago

Split £100 into the ratio 5:4:1

Mathematics

1 answer:

zhannawk [14.2K]4 years ago

7 0

X = 100 : 10 = 10
5x : 4x : x
50 : 40 : 10

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After a special medicine is introduced into a petri dish full of bacteria, the number of bacteria remaining in the dish decrease

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4 years ago

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3 years ago

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3 years ago

−3(2a−14)−3a=24<br> what is a

tatuchka [14]

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$- 3(2a - 14) - 3a = 24$

$- 6a + 42 - 3a = 24$

$- 9a + 42 = 24$

Subtract sides 42

$- 9a + 42 - 42 = 24 - 42$

$- 9a = - 18$

Divide sides by - 9

$\frac{ - 9a}{ - 9} = \frac{ - 18}{ - 9} \\$

$a = 2$

_________________________________

CHECK :

$- 3(2(2) - 14) - 3(2) = 24$

$- 3(4 - 14) - 6 = 24$

$- 3( - 10) - 6 = 24$

$30 - 6 = 24$

$24 = 24$

Thus the solution is correct.....

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3 years ago