In 1673, the Hope diamond was reduced from its original weight by about 45 carats, resulting in a diamond weighing about 67 carats. Write and solve an equation to find how many carats the original diamond weighed.

67

Explanation:

Original weight: x

Original weight reduced by 45 carats: x - 45

Final weight: 67 carats

x - 45 = 67

Solve for x by adding 45 to both sides.

Once you get x, subtract 45 and you should get 67 again.

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