In the 2006 documentary An Inconvenient Truth, former Vice President Al Gore strives to inform the public about the apparent dangers of global warming. Some segments counter critics' claims that global warming
is unproven or that it will not have significant consequences, and others illustrate what could happen to
animals that are particularly vulnerable to climate change. Gore also describes actions that can be taken to
successfully reverse the effects of global warming and encourages viewers to assist in these efforts.
Question
The passage suggests that
O global warming is not as dangerous as people think
O climate change will likely not affect animals
Othere is no scientific evidence to support Gore's claims about global warming
there is some disagreement about the existence and impact of global warming

there is some disagreement about the existence and impact of global warming

Explanation:

The passage above shows that there is, somehow, a disagreement when it comes to the existence and impact of global warming. Although President Gore tries to tell the people of the dangers of global warming, some says that global warming is not true. Other people say that it has an effect  or impact on the animals. The ideas stemming from this issue are opposing each other. This means that not everyone has the same opinion regarding the existence and impact of global warming in the world; thus, the disagreement.

what is the question that you are asking

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4