PPT Slide

preintervention

INTERVENTION AS SURGERY

postintervention

2X ? 2Y + Z ? 1 = 0

2X + 2Y ? 3Z + 3 = 0

= Y + 1

Z

0

X

Y

Z

• 2

+ 1

impossible

= Z ? 1

Y

= 0

Y

X

Z

• 1/2

- 1

0

Y

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