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alexandr1967 [171]
3 years ago
5

18=3(1+12 x)-5(10x+11)

Mathematics
1 answer:
madreJ [45]3 years ago
6 0
18=3+36x-50x-55

18=3-14x-55

18=-14x-52

70=-14x

x=-5
You might be interested in
Find two positive numbers if their ratio is 8:5 and the difference is 150.
natima [27]
Let's call the two numbers x and y. We can write a system of equations to describe the situation:

5x = 8y

x - y = 150

Let's solve the first equation for x:

x = 8y/5

Now we can use substitution to solve the system by plugging 8y/5 in for x in the second equation:

(8y/5) - y = 150

Simplify:

3y/5 = 150

3y = 750

y = 250

If y = 250, then x is:

x = 8(250)/5 = 400

The answer is 250 and 400.






7 0
3 years ago
Help fast!!! Give me the real solution pls. First correct awnser get brainliest!
Over [174]

Answer:

She subtracted the two 10x's where instead you're supposed to add them together.

Step-by-step explanation:

3 0
3 years ago
3) The sum of three consecutive numbers is 72.<br> What are the smallest of these numbers?
Oksi-84 [34.3K]

Answer:

23

Step-by-step explanation:

x+x+1=x+2=72

3x+3=72

3x=69

x=23

23+24+25=72

7 0
3 years ago
Solve 4(10x - 2) = 192​
MAXImum [283]

Answer:

5

Step-by-step explanation:

4*10x=40x

4*2=8

40x-8=192

40x=192+8

=200

X= 200/40

=5

5 0
3 years ago
5 7\10 × 7 4\16=????? I'm trash with multypliing ​
-BARSIC- [3]

9514 1404 393

Answer:

  41 13/40

Step-by-step explanation:

Generally, you're told to multiply mixed numbers by converting each to an improper fraction:

  5 7/10 = (5·10 +7)/10 = 57/10

  7 4/16 = (7·16 +4)/16 = 116/16

The fractions are multiplied by multiplying their numerators to get the numerator of the result, and multiplying their denominators to get the denominator of the result.

  (5\frac{7}{10})(7\frac{4}{16})=\dfrac{57}{10}\cdot\dfrac{116}{16}=\dfrac{57\cdot116}{10\cdot16}=\dfrac{6612}{160}\\\\=41+\dfrac{52}{160}=\boxed{41\frac{13}{40}}

__

You don't have to mess with reducing the fraction of the result if you reduce the fraction 4/16 to 1/4 to begin with. Then the product is (57/10)(29/4).

_____

<em>Alternate solution</em>

You can also treat this as the product of two sums. The distributive property is handy for this.

  (5 + 7/10)(7 + 1/4) = (5)(7) +(5)(1/4) +(7/10)(7) +(7/10)(1/4)

  = 35 +5/4 +49/10 +7/40

  = 35 +1 +1/4 + 4 + 9/10 + 7/40 . . . . take out the integer parts

  = 40 +10/40 +36/40 +7/40 . . . . . . use 40 as a common denominator

  = 40 +53/40 = 41 13/40

3 0
2 years ago
Read 2 more answers
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