Respuesta :

because it's a right angle you can do 6x+4x+10=90 x=8
Sapphire19
The little box on the angle means it is a 90° angle.

Your starting equation would be 6x +4x +10= 90.
From here, you would combine like terms so the new equation would be 10x +10 =90.

The next step is to subtract 10 from both side so 10x +10-10=90-10 which gets your 10x=80

The last step is to divide 10 from both sides so 10x/10=80/10.

Your final answer would be x=8

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