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:

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

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

$x = 10$

How do you solve: 5x + 3x = 805x + 3x = 80?