9b-13b= -4b
-4b = 40
Divide both sides by -4
b = -10
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1 multiplied by 40 equals 40.
40 times 9 equals 360.
0.4 times 100 equals 40
120
Examples of division sums whose quotient equals 40 are: 320/8 = 40 160/4 = 40 120/3 = 40 80/2 = 40