02-12-2015
Mathematics

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How you solve b-9+6b=30

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ImpatientAngel ImpatientAngel

02-12-2015

b - 9 + 6b = 30

b+ 6b - 9 = 30

7b - 9 = 30

7b = 39

b = [tex] \frac{39}{7} [/tex]

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apologiabiology apologiabiology

02-12-2015

associative property is moving a+b=b+a
add like terms
1b+6b-9=30
7b-9=30
add 9 to both sides
7b=39
divide both sides by 7
b=39/7
39/7=5 and 4/7

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