13=-3/10*10+b

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Solution for 13=-3/10*10+b equation: 



13=-3/10*10+b

We move all terms to the left:

13-(-3/10*10+b)=0



Domain of the equation: 10*10+b)!=0

b∈R



We add all the numbers together, and all the variables

-(+b-3/10*10)+13=0

We get rid of parentheses

-b+13+3/10*10=0

We multiply all the terms by the denominator


-b*10*10+3+13*10*10=0

We add all the numbers together, and all the variables

-b*10*10+1303=0

Wy multiply elements

-100b*1+1303=0

Wy multiply elements

-100b+1303=0

We move all terms containing b to the left, all other terms to the right

-100b=-1303

b=-1303/-100

b=13+3/100

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