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3 years ago

Solve: 4x – 6 = 42 A)9 B)8 C)63 D)12

Mathematics

2 answers:

lara31 [8.8K]3 years ago

7 0

Hii :)

$\tt \: 4x - 6 = 42 \\ \tt \: 4x = 42 + 6 \\ \tt \: 4x = 48 \\ \tt \: x = 48 \div 4 \\ \boxed{\tt \: x = 12} \\ \\ \\ \: \: \: \: \: \: \: \: \: \overbrace{ \underbrace{ \sf \: \infty \: Carry \: on \: Learning! \: \infty }}$

ᴛʜᴇᴇxᴛʀᴀᴛᴇʀᴇꜱᴛʀɪᴀʟ

jenyasd209 [6]3 years ago

4 0

$4x-6=42\\\\4x=42+6\\\\4x=48 \ \ /:4\\\\\huge\boxed{x=12}$

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Can this be simplified?

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No Nothing Further Can Be Done

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Percent change = (new number - old number)/(old number) * 100

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Answer:

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3 years ago

$13,957 is invested, part at 7% and the rest at 6%. If the interest earned from the amount invested at 7% exceeds the interest e

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Answer:

The Amount invested at 7% interest is $12,855

The Amount invested at 6% interest = $1,102

Step-by-step explanation:

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The Total money invested = $13,957

Let The money invested at 7% = $p_1$ = $A

And The money invested at 6% = $p_2$ = $13957 - $A

Let The interest earn at 7% = $I_1$

And The interest earn at 6% = $I_2$

$I_1$ - $I_2$ = $833.73

Let The time period = 1 year

Now, From Simple Interest method

Simple Interest = $\dfrac{\textrm principal\times \textrm rate\times \textrm time}{100}$

Or, $I_1$ = $\dfrac{\textrm p_1\times \textrm 7\times \textrm 1}{100}$

Or, $I_1$ = $\dfrac{\textrm A\times \textrm 7\times \textrm 1}{100}$

And

$I_2$ = $\dfrac{\textrm p_2\times \textrm 6\times \textrm 1}{100}$

Or, $I_2$ = $\dfrac{\textrm (13,957 - A)\times \textrm 6\times \textrm 1}{100}$

∵ $I_1$ - $I_2$ = $833.73

So, $\dfrac{\textrm A\times \textrm 7\times \textrm 1}{100}$ - $\dfrac{\textrm (13,957 - A)\times \textrm 6\times \textrm 1}{100}$ = $833.73

Or, 7 A - 6 (13,957 - A) = $833.73 × 100

Or, 7 A - $83,742 + 6 A = $83373

Or, 13 A = $83373 + $83742

Or, 13 A = $167,115

∴ A = $\dfrac{167115}{13}$

i.e A = $12,855

So, The Amount invested at 7% interest = A = $12,855

And The Amount invested at 6% interest = ($13,957 - A) = $13,957 - $12,855

I.e The Amount invested at 6% interest = $1,102

Hence,The Amount invested at 7% interest is $12,855

And The Amount invested at 6% interest = $1,102 . Answer

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If you would like to know what was the temperature after the increase, you can calculate this using the following step:

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