Identify Goal of Problem: Identify the goal of the problem. We need to find the value of x in the equation x - 21 = 6.Isolate Variable x: Isolate the variable x by adding 21 to both sides of the equation to cancel out the -21 on the left side. This gives us x - 21 + 21 = 6 + 21.Perform Addition: Perform the addition on both sides of the equation. On the left side, -21 + 21 equals 0, which leaves us with x. On the right side, 6 + 21 equals 27. So, we have x = 27.Check Solution: Check the solution by substituting the value of x back into the original equation to see if it satisfies the equation. So, we substitute x with 27 and get 27 - 21 = 6. Since 27 - 21 does indeed equal 6, our solution is correct.

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$x-21=6$

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Math Problems

Grade 6

Add, subtract, multiply, or divide two integers

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x-21=6

Identify Goal of Problem: Identify the goal of the problem. We need to find the value of $x$ in the equation $x - 21 = 6$ .
Isolate Variable $x$ : Isolate the variable $x$ by adding $21$ to both sides of the equation to cancel out the $-21$ on the left side. This gives us $x - 21 + 21 = 6 + 21$ .
Perform Addition: Perform the addition on both sides of the equation. On the left side, $-21 + 21$ equals $0$ , which leaves us with $x$ . On the right side, $6 + 21$ equals $27$ . So, we have $x = 27$ .
Check Solution: Check the solution by substituting the value of $x$ back into the original equation to see if it satisfies the equation. So, we substitute $x$ with $27$ and get $27 - 21 = 6$ . Since $27 - 21$ does indeed equal $6$ , our solution is correct.