How do you evaluate the expression #x+8y# when y=7 and x=4?

1 Answer
Shell
Nov 20, 2016

The answer is #60#.

Explanation:

Evaluate #color(red)x+8color(limegreen)y# when #color(limegreen)y=color(limegreen)7# and #color(red)x=color(red)4#

Substitute #color(red)4# for #color(red)x# and #color(limegreen)7# for #color(limegreen)y#.

#color(red)x+8color(limegreen)y=color(red)4+8(color(limegreen)7)=4+56=60#

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