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Best Answer

-7y + 21 = 3x

Add '7y' to both sides

21 = 3x + 7y

Subtract '3x' from both sides

21 - 3x = 7y

'Swop around'.

7y = -3x + 21

Divide both sides by '7'

y = -(3/7)x + 3

The slope of a straight line is the coefficient of 'x'

In this case it is ' -3/7'.

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lenpollock

Lvl 16
2y ago
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Wiki User

12y ago

-3/7

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Q: What is the slope of -7y plus 21 equals 3x?
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