Verify if (x+7)/(7+x) = 1: Fraction Equality Check

Question

Determine if the simplification described below is correct:

x+77+x=1 \frac{x+7}{7+x}=1

Video Solution

Solution Steps

00:00 Determine if the reduction is correct
00:03 We'll use the substitution law and arrange the denominator to match the numerator
00:12 We'll reduce what we can, when reducing the entire fraction 1 always remains
00:18 Let's compare the expressions
00:23 And this is the solution to the question

Step-by-Step Solution

To determine if the simplification x+77+x=1\frac{x+7}{7+x}=1 is correct, we need to analyze the given expression.

The expression x+77+x\frac{x+7}{7+x} involves two terms: x+7x + 7 in the numerator and 7+x7 + x in the denominator. These are both algebraic expressions that involve addition.

In mathematics, the commutative property of addition tells us that the order of terms does not affect their sum. Therefore:

  • x+7x + 7 is equivalent to 7+x7 + x.

This means that the numerator and denominator are indeed the same expression. As a result, the fraction x+77+x\frac{x+7}{7+x} simplifies to 11, since any non-zero number divided by itself equals 11.

Hence, the simplification described is indeed correct.

The conclusion is that the simplification x+77+x=1\frac{x+7}{7+x}=1 is Correct.

Answer

Correct