Identify equation to solve: Identify the equation to solve for m. The equation given is m+4=20. We need to isolate m on one side of the equation to find its value.
Subtract to isolate m: Subtract 4 from both sides of the equation to isolate m. This gives us m+4−4=20−4.
Perform subtraction: Perform the subtraction on both sides of the equation. This simplifies to m=20−4, which equals 16.
Check solution: Check the solution by substituting the value of m back into the original equation to ensure it satisfies the equation. Substituting m=16 into m+4 gives us 16+4, which equals 20. Since this is the same as the right side of the original equation, our solution is correct.
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