How do you solve $7x - 4+ x = 12$ ?

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Answer 1 · 2016-11-07T03:28:11

Combine like terms.

$stackrel("add")overbrace(7x + x) - 4 = 12$

$8x - 4 = 12$

Move the $-4$ over to the other side by adding $4$ to both sides.

$8x - 4$ $color(green)( + 4) = 16$ $color(green)( + 4)$

Divide by $8$ to get $x$ by itself.

$color(blue)(x) = 16/8 = color(blue)(2)$

You can also check your answer:

$7(2) - 4 + (2) stackrel(?)(=) 12$

$14 - 4 + 2 = 10 + 2 = 12$ $color(blue)(sqrt"")$

How do you solve 7x - 4+ x = 127x - 4+ x = 12?