dana2002 dana2002

10-01-2015
Mathematics

contestada

combine like terms 4x-5+(-7x)+9=

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apologiabiology apologiabiology

10-01-2015

just combine the x terms and the number terms exg
3x+4x=x(3+4)=7x

so 4x-5+(-7x)+9=
4x-5-7x+9

(4x-7x)+(-5+9)=
x(4-7)+(4)=
-3x+4
or 4-3x

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