b-11 = -13
add 11 to BOTH sides
b = -2
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1 divided by 13 equals 13
5
The answer to the problem of 13 equals -4x plus 9 is x equals -1.
13 add something equals 30 = 43
If you're asking what x equals, it equals 5 because 5x3=15, and 15-2=13.