Multiplying Equations in Combination

Occasionally, if you want to use equation combination to get rid of a variable, you’ll have to multiply each equation by a different number.

For example, in the following question, a good strategy for getting rid of y is to multiply the first equation by –5 and the second equation by what number?

In the space provided, type the number you would multiply the second equation by to make y cancel out, then click Continue.

Answer: