Example 5 Solve for x and y . Notice that there is no simple number to multiply either equation with to get the numbers in front of x or y to become the same or opposites. In this case, do the following: 1. Select a letter to eliminate. 2. Use the two numbers to the left of this letter. Find the least common multiple of this value as the desired number to be in front of each letter. 3. Determine what value each equation needs to be multiplied by to obtain this value and multiply the equation by that number. Suppose you want to eliminate x . The least common multiple of 3 and 5, the number in front of the
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