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lakkis [162]
4 years ago
11

Math problem solving equation

Mathematics
1 answer:
AlexFokin [52]4 years ago
8 0
The student didn’t make an error


Move variable to the left-hand side and change its sign

Move constant to the right-hand side and change its sign


Collect like terms -5a+2a= -3a
-3a=-9+12 Calculate the sum -9+12=3

-3a=3 Divide both sides of the equation by -3

And you should get a=-1
In my opinion
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