magsters934 magsters934

24-01-2017
Mathematics

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3x-9x+6=20-3x+4x Please answer.

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ParadoxThinker11 ParadoxThinker11

24-01-2017

I gotchu.
3x-9x+6=20-3x+4x
Combine like terms.
-6x+6=20+x
Bring x over to the left side.
-x -x
-7x+6=20
bring 6 to the right side.
-6 -6
-7x=14
Divide -7 on both sides to isolate x.
x= -2

CHECK
3x-9x+6=20-3x+4x
-6(-2)+6=20+(-2)
18=18
ANSWER: x= -2

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