NEED math hw please.
- Thread starter Ancient_Fish_Master
- Start date
I got that the smaller number is -4.8 and the larger is -1.6
I checked it, and it worked out.
The equations are: x+y=2(x-y) and y=2x+8
So what I did was substitue the y equation into the other equation:
x+(2x+8)=2[x-(2x+8)]
x+(2x+8)=2[x-2x-8]
x+(2x+8)=2x-4x-16
3x+8=-2x-16
5x+8=-16
5x=-24
x=-4.8
Then I substituted the value of x into the y equation:
y=2(-4.8)+8
y=-1.6
Then, to check my answer, I substituted both values into the original equation:
-4.8-1.6=2[-4.8-(-1.60)]
-6.4=2(-3.2)
-6.4=-6.4
Oh, and for my variables, x=smaller number, y=larger number
I checked it, and it worked out.
The equations are: x+y=2(x-y) and y=2x+8
So what I did was substitue the y equation into the other equation:
x+(2x+8)=2[x-(2x+8)]
x+(2x+8)=2[x-2x-8]
x+(2x+8)=2x-4x-16
3x+8=-2x-16
5x+8=-16
5x=-24
x=-4.8
Then I substituted the value of x into the y equation:
y=2(-4.8)+8
y=-1.6
Then, to check my answer, I substituted both values into the original equation:
-4.8-1.6=2[-4.8-(-1.60)]
-6.4=2(-3.2)
-6.4=-6.4
Oh, and for my variables, x=smaller number, y=larger number
The smaller number could not possibly be 8... if you put 8 into the first equation, you get 2.6666... and for the second equation, you get 24...
Maybe the first equation should be y-x rather than x-y.....
Maybe the first equation should be y-x rather than x-y.....
Yes, it should be x+y=2(y-x). They should have specified that, but y=24
Lol, sorry for the confusion, but the smaller number is 8, the larger is 24.
Lol, sorry for the confusion, but the smaller number is 8, the larger is 24.
This is it because you made y the larger number with the second equation, I missed it too the first time I checked your answer.
Yeah, math has always been one of my worst subjects thanks to dumb mistakes like that one.
