When I triple a certain number and add 2, I get the same answer as I do when I subtract the number from 50. Find the number.
Find the number.
Let the number be x, then according to question
3x+2=50-x
Solve for x.
3x+2=50-x⇒3x+x=50-2⇒4x=48⇒x=484∴x=12
Thus, the number is 12.
Set up equations and solve them to find the unknown numbers in the following cases:
(a) Add 4 to eight times a number; you get 60.
(b) One-fifth of a number minus 4 gives 3.
(c) If I take three-fourths of a number and add 3 to it, I get 21.
(d) When I subtracted 11 from twice a number, the result was 15.
(e) Munna subtracts thrice the number of notebooks he has from 50, he finds the result to be 8.
(f) Ibenhal thinks of a number. If she adds 19 to it and divides the sum by 5, she will get 8.
(g) Anwar thinks of a number. If he takes away 7 from of the number, the result is 23.