Solve for x: 3x + 5 = 20.

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Multiple Choice

Solve for x: 3x + 5 = 20.

Explanation:
To solve a simple linear equation, you isolate the variable by undoing the operations on it. Subtract 5 from both sides to get 3x = 15. Then divide both sides by 3 to obtain x = 5. Check by substituting: 3(5) + 5 = 15 + 5 = 20, which matches the right side. Testing other possibilities: if x is 0, the left side is 5; if x is 10, it's 35; if x is 15, it's 50. Only x = 5 satisfies the equation.

To solve a simple linear equation, you isolate the variable by undoing the operations on it. Subtract 5 from both sides to get 3x = 15. Then divide both sides by 3 to obtain x = 5. Check by substituting: 3(5) + 5 = 15 + 5 = 20, which matches the right side. Testing other possibilities: if x is 0, the left side is 5; if x is 10, it's 35; if x is 15, it's 50. Only x = 5 satisfies the equation.

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