(9х+9(х+1)+9(х+2)+9(х+3)) = -414
9x+9x+9+9x+18+9x+27=-414
36х+54=-414
36x=-468
x=-13
I - (-13*9)=-117; II - 9(х+1)=9(-13+1)=-108; III - 9(х+2)=9(-13+2)=-99; IV - 9(х+3) =9(-13+3)=-90
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(9х+9(х+1)+9(х+2)+9(х+3)) = -414
9x+9x+9+9x+18+9x+27=-414
36х+54=-414
36x=-468
x=-13
I - (-13*9)=-117; II - 9(х+1)=9(-13+1)=-108; III - 9(х+2)=9(-13+2)=-99; IV - 9(х+3) =9(-13+3)=-90