Advertisements
Advertisements
प्रश्न
From the sum of 5x + 7y – 12 and 3x – 5y + 2, subtract the sum of 2x – 7y – 1 and – 6x + 3y + 9
उत्तर
Sum of 5x + 7y – 12 and 3x – 5y + 2.
= 5x + 7y – 12 + 3x – 5y + 2
= (5 + 3)x + (7 – 5)y + ((– 12) + 2)
= 8x + 2y – 10.
Again Sum of 2x – 7y – 1 and – 6x + 3y + 9
= 2x – 7y – 1 + (– 6x + 3y + 9)
= 2x – 7y – 1 – 6x + 3y + 9
= (2 – 6)x + (– 7 + 3)y + (– 1 + 9)
= – 4x – 4y + 8
Now 8x + 2y – 10 – (– 4x – 4y + 8)
= 8x + 2y – 10 + (4x + 4y – 8)
= 8x + 2y – 10 + 4x + 4y – 8
= (8 + 4)x + (2 + 4)y + ((– 10) + (– 8))
= 12x + 6y – 18
APPEARS IN
संबंधित प्रश्न
Find x: −3(4x + 9) = 21
A mobile vendor has 22 items, some which are pencils and others are ball pens. On a particular day, he is able to sell the pencils and ball pens. Pencils are sold for ₹ 15 each and ball pens are sold at ₹ 20 each. If the total sale amount with the vendor is ₹ 380, how many pencils did he sell?
The generalization of the number pattern 3, 6, 9, 12, ... is
Thrice a number when increased by 5 gives 44. Find the number
The length of part B in the pencil shown is ‘a − 6’
What is the value of ‘s’, if ‘2s – 6’ gives 30?
The product of ‘q’ and 20 is '20q'
Translate the following statements into an equation:
The diameter (d) of a circle is twice its radius (r).
Translate the following statements into an equation:
The selling price (s) of an item is equal to the sum of the cost price (c) of an item and the profit (p) earned.
On my last birthday, I weighed 40 kg. If I put on m kg of weight after a year, what is my present weight?
