Please answer these questions! Thank you!

Leo has b boxes of pencils. each box contains 6 pencils. he has a total of 42 pencils. the equation that represents this situation the value of b that makes the equation true the first one is b+6=42,6b=42,b=42+6,or 42b=6 the second one are 7,836 48

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

Will gve pints stars and brainliest