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Which equation is obtained by simplifying (8x+4y=20)?

Answer and explanation

Correct answer: (2x+y=5)

The direct answer is option B: 2x + y = 5. To simplify an equation without changing its solution set, divide every term on both sides by the same nonzero number. Starting with 8x + 4y = 20, divide all terms by 4: 8x/4 + 4y/4 = 20/4, giving 2x + y = 5. Option A, 4x + y = 20, divides only some terms and leaves the constant unchanged, so it is not equivalent. Option B divides every term correctly. Option C, x + 4y = 5, changes the coefficients incorrectly. Option D, 2x + 4y = 20, changes only one coefficient and is not the result of common division. Memory cue: when simplifying an equation, apply the same operation to every term on both sides.

Related tags

SimplificationLinear EquationsGraphical Method

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