How do you solve for a in $x = - \frac{b}{2} a$ $x= -b/2a$ ?

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Answer 1 · 2018-04-22T13:57:16

$\frac{2 x}{- b} = a$ $(2x)/(-b)=a$

You have to reverse the mapping, so first multiply both sides by 2 this will remove it from the RHS (right hand side)

$2 x = - 2 \frac{b}{2} a$ $color(red)2x=-color(red)2b/color(red)2a$

$2 x = - b a$ $2x=-ba$

Divide by negative b or $- b$ $-b$

$\frac{2 x}{- b} = \frac{- b}{- b} a$ $(2x)/color(red)(-b)=color(red)(-b)/color(red)(-b)a$

$\frac{2 x}{- b} = a$ $(2x)/(-b)=a$

How do you solve for a in x=−b2ax= -b/2a?