There should be another equation in order to solve this problem using simultaneous equations.
Otherwise, there will be more than one solution to this problem as there are different combinations of values for ( x ) & ( y ) which can be given.
For example, one answer could be:
x = 2
y = - 1 / 2
So if we substitute the values into the equation it would be as follows:
5x + 4y = 8
5 ( 2 ) + 4 ( - 1 / 2 ) = 8
10 + - 2 = 8
10 - 2 = 8
8 = 8
Another answer could be:
x = 4
y = - 3
So if we substitute the values into the equation it would be as follows:
5x + 4y = 8
5 ( 4 ) + 4 ( - 3 ) = 8
20 + - 12 = 8
20 - 12 = 8
8 = 8
As you can see, there are more than one solution for this equation. So unless the problem is asking you to just give one of various solutions and isn't asking for one definitive solution, then you will require another equation in order to solve this problem.
Hope this was helpful! <3
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