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Pie
2 years ago
14

Rewrite the equation below so that it does not have fractions.

Mathematics
2 answers:
Eddi Din [679]2 years ago
6 0

15x = 48

Step-by-step explanation:

\begin{aligned}\rm\frac{3}{4}x-2&=\rm \frac{2}{5}\to(multiplied~by~20)\\\rm(20)\frac{3}{4}x-(20)2&=(20)\frac{2}{5}\\\rm 15x-40&=8\\\rm 15x&=8+40\\\rm 15x&=48\end{aligned}

lidiya [134]2 years ago
4 0

Answer:

\frac{15}{20} x-2=\frac{8}{20}

Step-by-step explanation:

\frac{3}{4} x-2=\frac{2}{5}

3/4 and 2/5 have a common denominator which is twenty so you can rewrite the equation with just knowing that

\frac{3}{4} =\frac{15}{20}

\frac{2}{5} =\frac{8}{20}

\frac{15}{20} x-2=\frac{8}{20}

You can then multiply both sides by twenty to solve this equation.

Hope this helps.

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A-2=-1 + 2a-4-1<br><br> send me the work please! (solving equations with variables on both sides)
Vladimir [108]

The value of "a" is 4

<em><u>Solution:</u></em>

<em><u>Given expression is:</u></em>

a - 2  = -1 + 2a - 4-1

The above expression involves variables and constants

A variable is a symbol that represents an unknown number

Here the variable is "a"

Constants are fixed numbers like 1, 2 etc

<em><u>From given expression:</u></em>

a - 2  = -1 + 2a - 4-1

Move the varibale "2a" from right side to left side of equation

When, 2a is moved from R.H.S to L.H.S, it becomes -2a

a -2a - 2 = -1 -4-1

Now move the constant -2 from left side to right side of equation

Similarly, when -2 is moved from L.H.S to R.H.S, it becomes +2

a-2a = -1-4-1+2

Now add the variables on left side of equation

-a = -1-4-1+2

Now add the constants on right side of equation

-a = -6+2\\\\-a = -4

Cancel the negative sign on both sides of equation

a=4

Thus the value of "a" is 4

6 0
2 years ago
anonymous anonymous 3 years ago On October 2,1991 the Japanese yen was worth .0075 united states dollars. at that time, how much
tiny-mole [99]
1 yen = 0.0075 dollar
450 yen = 0.0075 x 450 = $3.375
3 0
3 years ago
What is nine divided by five to the sixth power?
MariettaO [177]

nine divided by five to the sixth power is 0.000576

8 0
3 years ago
Read 2 more answers
You and your friend go out to dinner The cost of your meal is 12.75, your friend's meal is 13.95. You tell your friend that you
gavmur [86]

answer: 5.34

Step by step explanation 12.75 + 13.95=26.7

20% of 26.7 is 5.34

6 0
1 year ago
Find a three digit number. The tens digit is 3 time the hundreds digit. The sum of the digits is 15. If you reverse the digits,
tresset_1 [31]

Answer:

number = 267

Step-by-step explanation:

i am a 3 digit number divisible by 3.

100a + 10b + c

my tens digit is 3 times as great as my hundreds digit

b = 3a, from this we know a = 1, 2, 3, then b = 3, 6, 9

and the sum of my digits is 15.

a + b + c = 15

if you reverse my digits i am divisible by 6 and 3

100c + 10b + a

this is a logic problem, an equation won't help us here

From the given information b = 3a, and the sum of the 3 digits = 15, we have:

1 3 ___; three single digits can't add up to 15

2 6 _7_; this has to be the number

3 9 _3_; reverse number is not different

Check for division by 3 and 6

267/3 = 89

762/6 = 127

267 is the number

3 0
2 years ago
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