What is x?

Question

(x-12)+2x=90

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Answer 1 · 2018-02-17T17:49:57

$x=34$

$(x-12)+2x=90$
Opening the bracket,
$x-12+2x=90$
$3x-12=90$
$3x=90+12$
$3x=102$
$x=102/3$
$x=34$

Answer 2 · 2018-02-17T17:56:02

$x = 34$

$x - 12 + 2x = 90$

combine the $x$ terms
$3x -12 = 90$

add 12 to both sides
$3x = 102$

divide both sides by $3$
$x = 34$