Answer:
Step-by-step explanation:
<u><em>The complete question in the attached figure</em></u>
<em>Verify each case</em>
Part 1) we have
solve for x
Part 2) we have
Multiply both sides by -1 and rearrange the terms on the left side to get
This expression is the same that the expression in Part 1)
That means, that the equations Part 1) and Part 2) are equivalent
therefore
Part 3) we have
Remember that
This expression is the same that the expression in Part 1)
That means, that the equations Part 1) and Part 3) are equivalent
therefore
Part 4) we have
This equation is not equivalent to the other three, because some terms are multiplied by -8/7 and others are not. When different things are done on either side of the equal sign, it changes the equation, resulting in a different solution
