मराठी

If = 34x-2 and = x + 6, then find the value of: –

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प्रश्न

If = `3/4x - 2` and = x + 6, then find the value of:

बेरीज
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उत्तर

Given, = `3/4x - 2` and = x + 6

= `3/4 xx 10 - 2 - 4 - 6`

= `30/4 - 12/1`  ...[∵ LCM of 4 and 1 is 4]

= `(30 - 48)/4`

= `(-18)/4`

= `(-9)/2`

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पाठ 10: Algebraic Expressions - Exercise [पृष्ठ ३२७]

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एनसीईआरटी एक्झांप्लर Mathematics Exemplar Class 7
पाठ 10 Algebraic Expressions
Exercise | Q 90. (i) | पृष्ठ ३२७

संबंधित प्रश्‍न

Use the given algebraic expression to complete the table of number patterns.

S. No


Expression

Terms
1st 2nd 3rd 4th 5th ... 10th ... 100th ...
1 2n - 1 1 3 5 7 9 - 19 - - -
2 3n + 2 5 8 11 14 - - - - - -
3 4n + 1 5 9 13 17 - - - - - -
4 7n + 20 27 34 41 48 - - - - - -
5 n2 + 1 2 5 10 17 - - - - 10001 -

Write down the following in the product form: 6y5


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  1. We may first add 14 and 27 to get 41 and then add 13 to it to get the total sum 54 or
  2. We may add 27 and 13 to get 40 and then add 14 to get the sum 54. Thus, (14 + 27) + 13 = 14 + (27 + 13)

This can be done for any three numbers. This property is known as the associativity of addition of numbers. Express this property which we have already studied in the chapter on whole numbers, in a  general way, by using variables a, b and c.


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