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Irina18 [472]
2 years ago
7

Y = -3x - 13 9x - 2y = -4

Mathematics
2 answers:
Eddi Din [679]2 years ago
5 0

Answer

6

Step-by-step explanation:

Semmy [17]2 years ago
5 0

Answer:

6

Step-by-step explanation:

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The sum of the digits of a two-digit number is 12. The number formed by interchanging the digits is 54 more than the original nu
-BARSIC- [3]
Let X and Y be the digits.
If a two-digit number is written XY, then its value is 10x+y.
When the digits of the number are interchanged, it's YX, and its value is 10y+x.

The sum of the digits is 12.
The number formed by interchaning the digits is 54 more than the original number.

x+y=12 \\
10x+y+54=10y+x \\ \\
x+y=12 \\
10x-x+y-10y=-54 \\ \\
x+y=12 \\
9x-9y=-54 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\div 9 \\ \\
x+y=12 \\
\underline{x-y=-6} \\
x+x=12-6 \\
2x=6 \\
x=\frac{6}{2} \\
x=3 \\ \\
x+y=12 \\
3+y=12 \\
y=12-3 \\
y=9

The digits X and Y are 3 and 9, so the original number is 39.
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3 years ago
(NEED ASAP) 15 POINTS
yulyashka [42]

Answer:

1 and 2 go in the 2nd area and 3 gos to the 1st and 4th gos to the last one

Step-by-step explanation:

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after allowing 5 percent discount on the marked price of a radio 10 percent vat is charged on it , then its price became rs 1672
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<em>Hi</em><em>,</em><em> </em><em>there</em><em>!</em><em>!</em><em>!</em>

<em>The</em><em> </em><em>solutions</em><em> </em><em>in</em><em> </em><em>pictures</em><em> </em><em>will</em><em> </em><em>help you</em><em>. </em>

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What is the perimeter
loris [4]

Answer:

81

Step-by-step explanation:

Add all of the together to find how much they all equal. 27x3 = 81

4 0
2 years ago
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How do i solve for x??
kirza4 [7]

Answer:

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Step-by-step explanation:

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