title: Unable satisfy constraints when changing multiplier in constraintWithItem
body: <p>I'm  trying to get my container view working. The problem is when changing the multiplier to something diffrent than 0.5 I get :</p>
  
  <blockquote>
    <p>Unable to simultaneously satisfy constraints.</p>
  </blockquote>
  
  <p>for example, If I change *c2 multipier to 0.4 and *c8 to 0.6 I get the above error. But if I change back to 0.5 it´s all fine. What am I doing wrong here? 
  I got some more constraints but they are for vertically layout so I don´t think they are the problem.</p>
  
  <pre><code> NSLayoutConstraint *c1 = [NSLayoutConstraint constraintWithItem: contentView
                                                        attribute: NSLayoutAttributeLeft
                                                        relatedBy: NSLayoutRelationEqual
                                                           toItem:self.view
                                                        attribute:NSLayoutAttributeLeft
                                                       multiplier:1.0
                                                         constant:0.0];
  
  
  NSLayoutConstraint *c2 = [NSLayoutConstraint constraintWithItem: contentView
                                                        attribute: NSLayoutAttributeWidth
                                                        relatedBy: NSLayoutRelationEqual
                                                           toItem:self.view
                                                        attribute:NSLayoutAttributeWidth
                                                       multiplier:.4
                                                         constant:0.0];
  
  
  // detailView
  
  NSLayoutConstraint *c7 = [NSLayoutConstraint constraintWithItem: detailView
                                                        attribute: NSLayoutAttributeRight
                                                        relatedBy: NSLayoutRelationEqual
                                                           toItem:self.view
                                                        attribute:NSLayoutAttributeRight
                                                       multiplier:1.0
                                                         constant:0.0];
  
  
  NSLayoutConstraint *c8 = [NSLayoutConstraint constraintWithItem: detailView
                                                        attribute: NSLayoutAttributeWidth
                                                        relatedBy: NSLayoutRelationEqual
                                                           toItem:self.view
                                                        attribute:NSLayoutAttributeWidth
                                                       multiplier:.6
                                                         constant:0.0];
  </code></pre>