Help on number 5 on page 69 please

Sure. The trick here is to look for opportunities to eliminate the variables you don’t want (i.e., *y* and *z*) by adding or subtracting. In this case, look what happens when you add all three equations together:

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- Help on number 5 on page 69 please

Help on number 5 on page 69 please

Sure. The trick here is to look for opportunities to eliminate the variables you don’t want (i.e., *y* and *z*) by adding or subtracting. In this case, look what happens when you add all three equations together:

Tags: systems of equations

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