1/4
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4a + 4b is one possible answer.
2a-6a-a=b+4b-4b -5a=5b-4b -5a=1b a=-5 b=1
4b
4b + 3 = 15 First, Subtract 3 from both sides. -3 -3 4b = 12 Then, divide by 4 to get b by itself. 4 4 b = 3
a+a+a+a+b+b - add the like terms =4a+2b 4a and 2b cannot be added because they are not like terms.