Math Blue Book Answers and Workings (Pg 37)

Q1:  5x+22-6x-23
= -x-1

Q2:7a-3b+4c-5b-6b
=7a-14b+4c

Q3:-ab-5bc+3ab-6bc
=2ab-11bc

Q4:2(3x+7)
=6x+14

Q5:4u-3(2u-5v)
=15v-2u

Q6:2(2x-3y)-(x+4y)
=4x-6y-x-4y
=3x-10y

Q7:-4(x-2y)+6(x+y)
=-4x+8y+6x+6y
=10x+14y

Q8:a-2[(3b-2a)+a]
=a-2[3b-2a+a]
=a-2[3b-a]
=a-6b+2a
=3a-6b

Q9:4/15 h -2k-5/9(2h-7k)
=4/15 h -2k-10/9h +35/9 k
=-38/45 h + 17/9 k

Q10:0.5a-0.65b-0.25a=2(4ab)
=0.25a-0.65b+8ab