How do you simplify #\frac { 1} { 3} ( - 9) ( - x ) #?

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Answer 1 · 2017-11-11T11:03:15

See a solution process below:

First, rewrite the expression and simplify the constants as:

#(1/3 xx -9)(-x) =>#

#(-9/3)(-x) =>#

#((3 xx -3)/3)(-x) =>#

#((color(red)(cancel(color(black)(3)))1 xx -3)/(color(red)(cancel(color(black)(3)))1))(-x) =>#

#((1 xx -3)/1)(-x) =>#

#(-3)/1(-x) =>#

#-3(-x)#

Remembering "a minus times a minus is a plus" we can complete the simplification as:

#3x#