01-12-2016
Mathematics

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solve for x 5 (x+2)=8x+20

solve for x 5 x28x20 class=

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xman7373 xman7373

01-12-2016

Distribute the 5 outside the parentheses into the parentheses.
5(x+2)=8x+20
5x+10=8x+20
Bring x to one side, other numbers to another
5x+10=8x+20
-8x -8x
-10 -10
-3x=10
divide by -3
x=-10/3
approximately -3.33333333

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01-12-2016

First, Distributive Property

5 (x+2)=8x+20
5x+10=8x+20 *Move constants and variables to opposite sides*
-5x -5x
-----------------
10=3x+20
-20 -20
-------------
-10=3x
----- -----
3 3

x= -10/3

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solve using addition method 3x-3y+2z=7 3x+y-3z=-5 7x-y-2z=0