13 subtracted from twice of a number gives 3.
2x − 13 = 3
One-fifth of a number is 5 less than that number.
x/5 = x − 5
A number is 7 more than one-third of itself.
x = 7 + x/3
Six times a number is 10 more than the number.
6x = x + 10
If 10 is subtracted from half of a number, the result is 4.
x/2 − 10 = 4
Five times a number increased by 7 is 27.
5x + 7 = 27
Mohan is 3 years older than Sohan. The sum of their ages is 43 years.
x + (x + 3) = 43
If 1 is subtracted from a number and the difference is multiplied by 1/2, the result is 7.
(1/2)(x − 1) = 7
A number divided by 2 and then increased by 5 is 9.
x/2 + 5 = 9
The sum of twice a number and 4 is 18.
2x + 4 = 18