How do you solve 2x + 7 = 8?

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Answer 1 · 2017-03-27T00:18:02

See the entire solution process below:

Step 1) Subtract $color(red)(7)$ from each side of the equation to isolate the $x$ term while keeping the equation balanced:

$2x + 7 - color(red)(7) = 8 - color(red)(7)$

$2x + 0 = 1$

$2x = 1$

Step 2) Divide each side of the equation by $color(red)(2)$ to solve for $x$ while keeping the equation balanced:

$(2x)/color(red)(2) = 1/color(red)(2)$

$(color(red)(cancel(color(black)(2)))x)/cancel(color(red)(2)) = 1/2$

$x = 1/2$