Answer :
The question seems to involve basic arithmetic and algebra, specifically solving for an unknown variable, often found in middle school math.
In algebra, when you have an equation like [tex]x + 7 = 15[/tex], you are trying to find the value of [tex]x[/tex] that makes the equation true. Without solving it step-by-step, you can use mental math to determine the value of [tex]x[/tex].
Here's how you can think about it:
You are given that [tex]x + 7 = 15[/tex].
To find [tex]x[/tex], think about what number, when added to 7, equals 15.
Since 7 plus 8 equals 15, you can conclude that [tex]x = 8[/tex].
This kind of reasoning helps develop number sense and algebraic thinking skills, which are crucial in mathematics. Understanding how numbers relate through operations like addition is a fundamental concept at this grade level.
