06-05-2018
Mathematics

contestada

If 8a−4b=20 and 4a−8b=4, then what is the value of a−b?

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brodybujnowski brodybujnowski

06-05-2018

I’m more than likely wrong but 2 and 5

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cindyzhao cindyzhao

08-05-2018

first simplify the equations to make it easier.
2a-b=5
a-2b=1
a=1+2b
plug that into the first equation.
2+4b-b=5
b=1
a=3
3-1=2 your answer therefore is 2.

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