Mathematics
Fill in the blanks :
(i) An equation involving one variable with highest power ……………, is called a linear equation in that variable.
(ii) The solution of an equation is also called …………… of the given equation.
(iii) The process in which we drop a term from one side of an equation and put it on the other side with sign changed is called …………… .
(iv) A linear equation can have at the most …………… solution(s).
(v) If thrice a number increased by 8 gives 23, then the number is …………… .
(vi) If x - 7 = 4, then 3x - 15 is equal to …………… .
Related Questions
What number must be added to 54 so that the resulting number is 7 times the number added?
- 6
- 7
- 8
- 9
The ages of A and B are in the ratio 2 : 5. After 6 years, their ages will be in the ratio 1 : 2. The present age of B is
- 20 years
- 24 years
- 30 years
- 36 years
Sanjay runs a computer repair service company. For an HP laptop, he charges ₹ 320 for diagnosis and ₹ 90 per hour for repairs. For a Dell laptop, he charges ₹ 480 for diagnosis and ₹ 70 per hour for repairs.
(1) Sanjay repairs an HP laptop of Mr Lal. He charges ₹ 950 for the work. How long did the repair work take place?
- 6 hours
- 7 hours
- 8 hours
- 9 hours
(2) Sanjay repairs a Dell laptop of Mr Gupta. The total charges were ₹ 830. How long did the repair work take place?
- 5 hours
- 6 hours
- 7 hours
- 8 hours
(3) He repairs an HP laptop and a Dell laptop of Mr Subhash. He found that the repair work for both the laptops took equal time and also the service charges of the two laptops were the same. How long did the repair work take place for each laptop ?
- 6 hours
- 7 hours
- 8 hours
- 9 hours
(4) What were the total service charges that Mr. Subhash had to pay for both the laptops ?
- ₹ 1040
- ₹ 1260
- ₹ 2040
- ₹ 2520