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5 votes
-5+2(10b-2)=31 need help thanks!

2 Answers

7 votes

Answer:


\Large \boxed{b=2}

Explanation:

-5+2(10b-2)=31

Expand brackets.

-5+20b-4=31

-9+20b=31

Add 9 on both sides.

20b=40

Divide both sides by 20

b=2

User Derek Lawless
by
8.1k points
2 votes

Answer:

b = 2

Explanation:

-5+2(10b-2)=31

Multiply the terms in the bracket

That's

- 5 + 20b - 4 = 31

Group like terms

Send the constants to the right side of the equation

That's

20b = 31 + 4 + 5

Simplify

20b = 40

Divide both sides by 20

We have the final answer as

b = 2

Hope this helps you

User Fedoranimus
by
6.9k points