Given the equations below, what is the value of b?

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Accepted Answer

In the first equation, multiply the (b + 4) term by –2: –2(b + 4) = –2b – 8. Add 8 to both sides of the equation, and the first equation becomes 9a – 2b = 38. Multiply the second equation by 2 and subtract it from the first equation. The a terms will drop out, and you can solve for b: 2(4.5a – 3b = 3) = 9a – 6b = 6 9a – 2b = 38 – (9a – 6b = 6) 4b = 32 b = 8

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