How do you evaluate the variable expression x + y + z when: x = 3/4, y = 1/2, z = -7/10?

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Answer 1 · 2016-07-27T16:00:36

Substitute the values for the variables and add them all together.

First, let's substitute the values for the variables:

#3/4+1/2-7/10#

Next, let's find a common denominator for the three fractions to make it easier to add:

#15/20+10/20-14/20#

Lastly, let's add them all together:

#15/20+10/20-14/20=11/20#

#11/20# is your answer.