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Anonymous
The answer to the problem of 13 equals -4x plus 9 is x equals -1.
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4x+13 = 21 4x = 21-13 4x = 8 x = 2
4x = -36 x = -9
8x+5=4x+13 4x=8 x=2 Therefore, your answer is 2.
Y- intercept of 4x+8y=16
X= -8