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9 + b = -12 q+ (-9) = 12
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3 votes
9 + b = -12
q+ (-9) = 12

User Tokes
by
8.7k points

1 Answer

4 votes
Subtract 9 from both sides

b = -12 - 9

simplify -12 - 9

Answer: b = -21

9 + -21 = -12 is true.

simplify brackets

simplify q + -9 to q - 9

add 9 to both sides

simplify 12 + 9 to 21

q = 21

21 + -9 = 12 is true.
User Kaffee
by
7.4k points
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