Q: What is 4x plus y equals -9?

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4x

2

4x + y = 9 so that y = 9 - 4x 7x - 8y = 6 7x - 8*(9-4x) = 6 7x - 72 + 32x = 6 39x = 78 x = 2 Then y = 9 - 4x = 9-4*2 = 9-8 = 1

(2, 1)

4x + 2(3x) = 30 10x = 30 x= 3. Y= 9. (3,9)

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99

4x + 3y=9 x=0 y=3

2

x = 9 and y = 28

4x + y = 9 so that y = 9 - 4x 7x - 8y = 6 7x - 8*(9-4x) = 6 7x - 72 + 32x = 6 39x = 78 x = 2 Then y = 9 - 4x = 9-4*2 = 9-8 = 1

(2, 1)

y = 4x-3

4x + 2(3x) = 30 10x = 30 x= 3. Y= 9. (3,9)

y+6=4x-3 y=4x-9 This is the slope intercept form: y=mx+b m (slope) = 4

It is: y = -4x+12

2x-y=5, y=2x-5 4x+y=4, y=4-4x 2x-5=4-4x 6x=9 x=3/2 y= 2(3/2)-5 y=-2