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Colt1911 [192]
3 years ago
11

Simplify 2y (3-x) + 7 (x-2y)

Mathematics
2 answers:
dimaraw [331]3 years ago
7 0
Hi there!
Let's simplify step by step.


2y(3 - x) + 7(x - 2y) =
First we work out the parenthesis (for instance possible by using rainbow technique).

2y \times 3  +  2y \times -  x + 7 \times x + 7  \times  - 2y = \\ 6y - 2xy + 7x - 14y =
Finally we collect the common terms.

- 2xy + 7x - 8y
~ Hope this helps you!


Rufina [12.5K]3 years ago
3 0
The first step for solving this expression is to distribute 2y through the first parenthesis.
6y - 2xy + 7(x - 2y) 
Now distribute 7 through the second set of parenthesis.
6y - 2xy + 7x - 14y
Lastly,, collect the like terms with y.
-8y - 2xy + 7x
Since we cannot simplify any further,, -8y - 2xy + 7x is the correct answer to your question.
Let me know if you have any further questions.
:)
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<u>According to the questi</u>on,

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Two years ago,

Woman age = ( x - 2 ) years

Her daughter age = ( y - 2 ) years

Woman was 7 times old as her daughter. [ Given ]

x - 2 = 7 ( y - 2 )

=> x - 2 = 7y - 14

=> x - 2 + 14 = 7y

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Case 2 :

After Three years ,

Woman age = x + 3

Her daughter age = y + 3

she would be 4 times old as the girl. [ Given ]

x + 3 = 4 ( y + 3 )

=> x + 3 = 4y + 12

=> x = 4y + 12 - 3

=> x = 4y + 9....( ii )

Now,

★ Substituting the value of x = 4y + 9 from equation ( ii ) in equation ( i ),we get

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=> 4y + 9 + 12 = 7y

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Hence, the present age of women is 37 years and her daughter age is 7.

7 0
4 years ago
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