How do you solve: #5x + 3x = 80#?

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Answer 1 · 2017-11-12T18:40:39

See a solution process below:

First, combine like terms on the left side of the equation:

#5x + 3x = 80#

#(5 + 3)x = 80#

#8x = 80#

Now, divide each side of the equation by #color(red)(8)# to solve for #x# while keeping the equation balanced:

#(8x)/color(red)(8) = 80/color(red)(8)#

#(color(red)(cancel(color(black)(8)))x)/cancel(color(red)(8)) = 10#

#x = 10#