Respuesta :

wikk
The answer is 4.5 

The midpoint means that the lines on both sides of it are equal to each other

So if you sub 4.5 in each equation
2(4.5)+10 = 19
4(4.5)+1 = 19
The answer is 19 because 4.5 is x and you have substitute x with 4.5 in your equation. 
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