the equation of the line is 3x - 4y =12
i need to do linear equations.
the formula is y=mx+b
so would my answer be y= -3/4-3?
i'm not sure if it's right
can someone explain to me how you do this equation?
2007-12-05 3:16 am
回答 (6)
2007-12-05 3:24 am
✔ 最佳答案
3x-4y=12-3x -3x
--------------
-4y=-3x+12
/-4 /-4 /-4
----------------
y = 3/4x-3
Make sure you watch your negatives...you had the right idea, you just divided incorrectly
2007-12-05 11:35 am
let me see...
3x-4y=12
-4y=-3x+12
y=(3/4)x+3
no you did it wrong.
Your original equation is 3x-4y=12
so to solve that:
1. Subtract 3x from both sides to get:
-4y= -3x+12
2. Divide both sides by -4 to get your final answer.
y= 3/4x+3
so technically you did it right but you got the signs wrong. and you left off the X. make sure you don't do that on the test otherwise you'll be marked off.
3x-4y=12
-4y=-3x+12
y=(3/4)x+3
no you did it wrong.
Your original equation is 3x-4y=12
so to solve that:
1. Subtract 3x from both sides to get:
-4y= -3x+12
2. Divide both sides by -4 to get your final answer.
y= 3/4x+3
so technically you did it right but you got the signs wrong. and you left off the X. make sure you don't do that on the test otherwise you'll be marked off.
參考: i took algebra in middle school and my sophomore year. currently a junior who despises her STATS class/teacher.
2007-12-05 11:35 am
no, it's not right
2007-12-05 11:28 am
i hope this helps..
3x - 4y = 12
-4y = -3x + 12
y = -3x/(-4) + 12/(-4)
y = (3/4)x - 3
so...
3/4 is the slope
-3 is the y intercept
3x - 4y = 12
-4y = -3x + 12
y = -3x/(-4) + 12/(-4)
y = (3/4)x - 3
so...
3/4 is the slope
-3 is the y intercept
2007-12-05 11:26 am
3x - 4y = 12
3x - 3x - 4y = 12 - 3x
-4y = 12 - 3x
(-4y)/-4 = (12 - 3x)/-4
y = 12/-4 + -3x/-4
y = -3 + 3x/4
Remember negatives/negatives are positives.
3x - 3x - 4y = 12 - 3x
-4y = 12 - 3x
(-4y)/-4 = (12 - 3x)/-4
y = 12/-4 + -3x/-4
y = -3 + 3x/4
Remember negatives/negatives are positives.
2007-12-05 11:22 am
What you need to do is to isolate y onto the left hand side
3x-4y=12
-4y=-3x+12
y=(-3x+12)/-4
y=(3/4)x-3\
its not what you had
3x-4y=12
-4y=-3x+12
y=(-3x+12)/-4
y=(3/4)x-3\
its not what you had
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