Solve for x: -4x = 16.

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Multiple Choice

Solve for x: -4x = 16.

Explanation:
Think of -4x as -4 times x. To isolate x, divide both sides by -4. 16 ÷ (-4) equals -4, so x = -4. Check: -4 times -4 equals 16, which matches the right side. If x were 4, the left side would be -16; if x were -16, it would be 64; if x were 8, it would be -32. None of those equal 16, so only -4 works.

Think of -4x as -4 times x. To isolate x, divide both sides by -4. 16 ÷ (-4) equals -4, so x = -4.

Check: -4 times -4 equals 16, which matches the right side.

If x were 4, the left side would be -16; if x were -16, it would be 64; if x were 8, it would be -32. None of those equal 16, so only -4 works.

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