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9) (1 - 6x) + (7x + 3)10) (-4x + 4) – (8x + 7)11) (-x - 3) + (3x + 8)12) (7 + a)-(-7a + 1)14) (-3k - 1) + (7 + 2k)

Answer :

We solve as follows:

[tex](1-6x)+(7x+3)=x+4[/tex][tex](-4x+4)-(8x+7)=-12x-3[/tex][tex](-x-3)+(3x+8)=2x+5[/tex][tex](7+a)-(-7a+1)=8a+6[/tex][tex](-3k-1)+(7+2k)=-k+6[/tex]

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