Question

The sum of a number and 10 is 25​

Answer 1

If the sum of a number and 10 is 25, then that number is 15

x + 10 = 25

x = 25-10

x = 15

Answer 2

Answer:

$\Huge \boxed{B=15}$

Step-by-step explanation:

To solve this problem, first you have to isolate it on one side of the equation.

B+10=25

$\displaystyle b+10=25$

First, subtract 10 from both sides.

$\displaystyle b+10-10=25-10$

Solve.

$\displaystyle 25-10=15$

As a result, the correct answer is b=15.