1)\-b\=9; 2)\b\=0; 3)4+\3у\=7.

Question

1)\-b\=9; 2)\b\=0; 3)4+\3у\=7.

Answer 1

1)Ι-bΙ=9
    b = 9
2)ΙbΙ=0
    b = 0
3)4+Ι3yΙ=7 
   4+3y = 7
    3y = 7-4
    3y = 1
    y = 1/3

Comments

-y=-4 : у=4

Answer 2

1) b= +-9
2) b=0
3) y= +-1