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tino54
05.12.2019 •
Mathematics
What is the value of x in the equation 4 3/10-[2 2/5x+ 51/2]=1/2[-3 3/5x+1 1/5]
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Ответ:
The correct value for x = - 36 1/3
Step-by-step explanation:
1. Let's resolve the equation:
4 3/10-[2 2/5x+ 51/2] = 1/2[-3 3/5x+1 1/5]
For simplifying, let's convert all the expressions to fractions:
43/10 - (12x/5+ 51/2] = 1/2(- 18x/5 + 6/5)
43/10 - 12x/5 - 51/2 = - 18x/10 + 6/10
- 12x/5 + 18x/10 = 6/10 -43/10 + 51/2 (Like terms)
-24x + 18x = 6 - 43 + 255 (10 as Lowest Common Denominator)
-6x = 218
x = - 36.333
x = - 36 1/3
2. Let's prove that x = - 36 1/3 is correct, using it as -109/3
43/10 - (12x/5+ 51/2] = 1/2(- 18x/5 + 6/5)
43/10 - (12/5) * (-109/3) - 51/2 = 1/2 (-18/5 * - 109/3 + 6/5)
43/10 + 436/5 - 51/2 = 1/2 (654/5 + 6/5)
43/10 + 436/5 - 51/2 = 654/10 + 6/10
43 + 872 - 255 = 654 + 6 (10 as Lowest Common Denominator)
660 = 660
We proved that x = - 36 1/3 is correct
Ответ:
answer: two high and two low
step-by-step explanation: because the earth rotates through two tidal “bulges” every lunar day, coastal areas experience every 24 hours and 50 minutes. high tides occur 12 hours and 25 minutes apart.