Rozwią przykład: 3(x-2b+3)
3(x-2b+3)=3*x+3*(-2b)+3*3=3x+(-6b)+9=3x-6b+9
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3(x-2b+3)=3*x+3*(-2b)+3*3=3x+(-6b)+9=3x-6b+9