Respuesta :

Answer:

z=13

Step-by-step explanation:

The sum of the two angles is 90 degrees

2z+5   + 5z-6  = 90

Combine like terms

7z-1 = 90

Add 1 to each side

7z-1+1 = 90+1

7z = 91

Divide each side by 7

7z/7 = 91/7

z =13

Answer:

5

Step-by-step explanation:

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