alex is x years old his sister is 3 years older , togerther their age is 57. what is the equation for this.
x + x+3 = 57
x+3=57
54
To find the equation for this, let's denote Alex's age as x. Since his sister is 3 years older, her age would be x + 3.
Now, according to the given information, the sum of their ages is 57. Therefore, the equation can be written as:
x + (x + 3) = 57
Simplifying the equation, we have:
2x + 3 = 57
This equation can then be solved to determine the value of x, which represents Alex's age.