How do I find the variable?

x = 8

Step-by-step explanation:

Step 1:

9x = 72        Def. of an isosceles triangle

Step 2:

x = 72 ÷ 9        Divide

x = 8

Hope This Helps :)

answer:

what is your question that you ask

step-by-step explanation:

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step-by-step explanation: