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zloy xaker [14]
3 years ago
5

Solve 23(3x+9)=−2(2x+6).

Mathematics
2 answers:
Alchen [17]3 years ago
4 0
Simplify both sides then distribute.
(23 * 3x) + (23 * 9) = (-2 *2x) + (-2*6)
(69x) + (207) = (-4x) + (-12)
Add the lowest variable to both sides which turns 69x to 73x.
73x +207 = -12
Subtract 207 from both sides.
73x = -219
Divide both sides by 73.
73x/73 = -219/73

Answer: x = -3
aev [14]3 years ago
3 0
I think this is the answer. Hope it helps!!!

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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The half life of radium is 1690 years. if 80 grams are present now, how much will be present in 830 years
Pachacha [2.7K]

Answer:

A(t) = amount remaining in t years

      = A0ekt, where A0 is the initial amount and k is a constant to                     be determined.  

Since A(1690) = (1/2)A0 and A0 = 80,

                we have 40 = 80e1690k

                1/2 = e1690k

                ln(1/2) = 1690k

                k = -0.0004

So, A(t) = 80e-0.0004t

Therefore, A(430) = 80e-0.0004(430)

                           = 80e-0.172

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Step-by-step explanation:

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2 years ago
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