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GaryK [48]
3 years ago
14

How would I graph 2x+3y=−9

Mathematics
1 answer:
Norma-Jean [14]3 years ago
6 0

2x+3y=-9

slope formula :y= mx+b

m is the slope. b is the y- intercept.

Need to change 2x+3y=-9 into slope formula

3y= -2x-9

Divide by 3

y=-2/3x-3

Now Graphing :

1. Do the y- intercept first and then the slope.

2. Put a dot on the y-axis for -3

3. Then the slope.

4. Count down 2 from -3.

5. You will go down to -5.

6. Go across three times. Put a dot .

The line will be straight.

That's it .

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Solve the system of equations using substitution y=x-1 and y=-2x+5
pav-90 [236]
Since the two equations equal y, set them equal to each other.

x-1=-2x+5

From there, solve for x.

First get x on one side, by using the addition property of equality.

x-1=-2x+5
3x-1=5

Isolate x by adding 1.
3x=6

Lastly get x all by itself by dividing each side by 3.
x=2

You can now substitute your x-value, 2, into one of the equations (or both, if you wish; either one will result in the same answer.)

y=x-1
y=2-1
y=1

OR

y=-2x+5
y=-2(2)+5
y=-4+5
y=1

Final answer:
x=2 and y=1

Any questions or anything you would like me to clarify, feel free to ask :)
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