Question

-2a + 3 = 30-12 what does that equal ? ​

Answer 1

-2a =15
a = -7.5
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Answer 2

You would do 3=-3 then put -3 below 18 because 30-12=18 then do 18-3=15 then -2a/2 then 15/2,15/2 equals 7.5 so a=7.5