Question

(50 + x)
100
(50 + X)
4
4 (30 + x) = 3(50 + x) = 120 + 4x = 150 + 3x
4x - 3x = 150-120
x = 30.
quantity of lead to be added = 30 kg.
EXERCISE 7B
Twice a number when decreased by 7 gives 45. Find the number.
Thrice a number when increased by 5 gives 44. Find the number.
26
Four added to twice a number yields 2. Find the fraction.
5
A number when added to its half gives 72. Find the number.
A number added to its two-thirds is equal to 55. Find the number.
A number when multiplied by 4, exceeds itself by 45. Find the number.
. A number is as much greater than 21 as it is less than 71. Find the number.
Hint. (x-21) = (71-x).​

Answer 1

Answer:

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Answer 2

Answer:

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