How do you solve $9 x - (5 x + 5) = 5 x - 45$ $9x - ( 5x + 5) = 5x - 45$ ?

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Answer 1 · 2017-09-28T00:38:15

$x = 40$ $x=40$

$9 x - (5 x + 5) = 5 x - 45$ $9x-(5x+5)=5x-45$

First, expand the brackets:

$9 x - 5 x - 5 = 5 x - 45$ $9x-5x-5=5x-45$

Collect like terms on the left side:

$4 x - 5 = 5 x - 45$ $4x-5=5x-45$

Add $5$ $5$ to both sides:

$4 x - 5 + 5 = 5 x - 45 + 5$ $4x-5+5=5x-45+5$

$4 x = 5 x - 40$ $4x=5x-40$

Subtract $5 x$ $5x$ from both sides:

$4 x - 5 x = 5 x - 40 - 5 x$ $4x-5x=5x-40-5x$

$- x = - 40$ $-x=-40$

Multiply both sides by $- 1$ $-1$ :

$x = 40$ $x=40$

How do you solve 9x−(5x+5)=5x−459x - ( 5x + 5) = 5x - 45?