Respuesta :

gmany
If a triangle is equilateral then all three sides of equal length.
Therefore:
[tex]4x+21=3x+24\ \ \ \ |-21\\\\4x=3x+3\ \ \ \ |-3x\\\\\boxed{x=3\ units}[/tex]
X=3
to find x, it said both equations are equal, so put them equal to each other. 
3x + 24 = 4x + 21
-3x          -3x

24 = x + 21
-21       -21

3 = x

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