A first number plus twice a second number is 7

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A first number plus twice a second number is 7

Let the first number be x. Let the second number be y. We're given:

• A first number is x
• A second number is y
• Twice the second number means we multiply y by 2: 2y
• Plus means we add x to 2y: x + 2y
• The phrase is means an equation, so we set x + 2y equal to 7

x + 2y = 7