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6b +20 equals a and 4b +30 equals a b equals?

1 Answer

3 votes

Answer:

b=5

Explanation:

So, they basically equal each other since they both equal a.

6b+20=4b+30

Your first step is to move the variable to one side, by that I mean to subtract. You have to subtract the smallest number that has a variable, in this case it would be 4b.

6b+20= 4b+30

-4b -4b

Once you have subtracted the variable, and now that there is only one variable in the equation, you have to subtract 20, since that is the opposite of adding.

2b+20=30

-20 -20

Then, you have to divide 2 from 10, since that is the opposite of multiplying.

2b=10

2 2

Conclusion- b=5

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