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Xelga [282]
3 years ago
6

7-3b = 5b+15 solve the equation

Mathematics
2 answers:
densk [106]3 years ago
4 0

7-3b = 5b+15

move 5b to the other side

sign changes from +5b to -5b

7-3b-5b=5b-5b+15 ( combine like terms)

7-3b-5b=15

7-8b=15

move 7 to the other side

7-7-8b=15-7

-8b=15-7

-8b=8

divide both sides by -8

to get +b and by itself

-8b/-8=8/-8

Answer:

b=-1

Vsevolod [243]3 years ago
3 0

Answer:

b=-1

Step-by-step explanation:

we have isolate variable on one side and number on other

so we move 5b to the right side and it becomes negative and we move 7 to the left and it becomes negative

-3b-5b=15-7          

-8b = 8

__      __   (you divided -8 by -8b to isolate b and by the other side)

-8        -8

b= -1

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