Equations can have one solution, more than one solution or none at all.
The equation is given as:
[tex]2(2x - []) + 1 = 17 - 4x[/tex]
Represent the blank with y.
So, we have:
[tex]-2(2x - y) + 1 = 17 - 4x[/tex]
(a) The missing value when the equation is an identity equation
To do this, we simply solve for y in [tex]-2(2x - y) + 1 = 17 - 4x[/tex]
Open brackets
[tex]-4x +2y + 1 = 17 - 4x[/tex]
Collect like terms
[tex]2y = 17 - 1 + 4x - 4x[/tex]
[tex]2y = 16[/tex]
Divide both sides by 2
[tex]y = 8[/tex]
Hence, the equation is an identity when the missing value is 8
(b) The missing value when the equation has one solution
In (a), we have: [tex]y = 8[/tex]
For the equation to have one solution, variable x must be on either sides of the equation.
i.e. [tex]nx + y = 8[/tex] or [tex]y = 8 + nx[/tex], where [tex]n \ne 0[/tex]
Since x has been eliminated, then the equation can not have one solution.
(c) The missing value when the equation has no solution
In (a), we have: [tex]y = 8[/tex]
This means that the equation will have no solution when the missing value is not 8
i.e.
[tex]y \ne 8[/tex]
Read more about equations at:
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