How do you solve this Algebra Problem?

Question

9x-8y= -72

Show steps please!

Answer 1

This is not a problem you can solve. Without another equation, you cannot get just one answer. However, you can get a "y=" equation that you can graph to see all of the possible solutions.

9x-8y = -72

9x-8y-9x=-72-9x Subtract 9x from both sides to get it on the right
-8y=-72-9x
-8y/-8=-72/-8-9x/-8 Divide both sides by -8 to get it to "y="
y =9+(9/8)x
or
y=9+1.125x

Answer 2

9x= -72+8y (first add 8y to both sides)
9x/9= -72/9 + 8y/9 (then divide everything by 9)
x= -8+8y/9 (you can't figure out what x is until you know y's value, or vice versa).

Been a while since I did this crap. Hope it's right...

Answer 3

Step 1: count the x

Step 2: don't count 9

Step 3: add y

Step 4: give 72 a place

Step 5: start over

Step 6: 9x-8+y= ???

Step 7: answer that

Step 8: get it right pease my Final grade iz on the line!!!!

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Answer 4

9x - 8y = -72
-8y = -9x -72
8y = 9x +72
y = 9x/8 + 72/8
y = 9x/8 + 9

Answer 5

Solve for one var, then sub for the other.
9x=8y-72
x=[8y/9]-72/9
x=[8y/9] - 8
plug in
9([8y/9]-8)-8y=-72
8y-72-8y=-72
-72=-72
no solution

Answer 6

What am I solving for? x or y? To solve for two variables, you need two equations. Or, you need to have a variable defined to solve for the other variable.

x=-4 and y=4.5
or
x=8 and y=18
or
x=0 and y=9
or
x=-8 and y=0

There are many solutions to the problem when you guess one variable and solve for the other.

Answer 7

You can't. If there are TWO variables, you need TWO equations.

Otherwise you can have any number of solutions: e.g., x=0, y=9, or x= -8, y=0. The list can go on and on...

Answer 8

-8y=-9x-72
y=9/8x=9

Answer 9

cant solve for 2 variables with 1 equation....which one are you supposed to solve for or are there 2 equations??