Question

a+b+ab=90 then find a+b​
Note: the answer is not 90-ab
It's a normal number that doesn't iclude a or b

Answer 1

Answer:

I would say that a+b =90

Step-by-step explanation:

I used guess and check method .

So if a = 90 , b=0 then...

90 + 0 + (90 x 0 ) = ??

90 + 0 + 0 = 90

therefore a + b= 90

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. Hope this helps...