2006-06-21 22:34:02 · 15 answers · asked by marcylina m 1 in Science & Mathematics ➔ Mathematics
x = -15 + 19
x = 4
y = - 4 + 12
y = 8
i guess...
2006-06-21 22:38:32 · answer #1 · answered by J. McCoy 5 · 0⤊ 0⤋
lol people. the person wants to know HOW to do it, not just be told the answer. let's work this out ans i hope i get it right for ya.
Problem: x + y = 12, x - 19 = -15
Answer: x=4, y=8
Why?
1. Identify what you need to know.. What is X and what is Y?
2. We can see from the information that there is a way to find X in the second part of the equation. We obviously can't find out x+y=12 by itself.
x - 19 = -15... add 19 to both sides and we have x=19-15=4
So now we know x = 4.
3. Plug in 4 where ever there is x in the main equation.
x+y=12.. 4+y=12.. subtract the four from both sides y=12-4 = 8
4. So your answer are x=4 and y=8
Note: You have to know that x+y=12 is the main equation while x-19=-15 can be seen as just extra information to help solve the main equation.
2006-06-21 22:47:15 · answer #2 · answered by Anthony Taurus 3 · 0⤊ 0⤋
Take the second equation first. x-19 = -15. Taking the 19 to the otherside, you get x = -15+19 which gives x=4. Substitute this value in the first equation. so x+y=12 becomes 4+y=12. Taking the 4 to the right side, you get y=12-4 which gives y=8.So the answer is x=4 and y=8.
2006-06-21 22:40:32 · answer #3 · answered by Anonymous · 0⤊ 0⤋
x= 4; y= 8
2006-06-21 22:39:03 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Look at the second equation:
x-19= -15
Therefore, x= -15 - (-19)= -15 + 19= 4
So, when you have x= 4,
Look at the first equation; put x=4 in that equation, you get,
4+y = 12
Therefore, y= 12 - (4)= 12-4= 8
So, Answer:
x= 4 and y= 8.
2006-06-21 22:41:10 · answer #5 · answered by Raja Ji 2 · 0⤊ 0⤋
x=4,y=8
2006-06-21 22:37:15 · answer #6 · answered by robin 3 · 0⤊ 0⤋
x+y = 12 -----equation-1
x- 19 =-15 -------equation-2
taking equation 2;i.e. x-19 = -15
we can also say x = -15+19
this means x = 4
now putting the value of x in equation 1; 4+y = 12
y = 12 - 4
y = 8
for the puepose of checking put the values of x and y
2006-06-21 22:50:55 · answer #7 · answered by Anonymous · 0⤊ 0⤋
okay
x + y = 12
x-19 = -15
so get x alone by adding
x-19=-15
+19 =19
your result is
x=4
now you can plug in
4+y=12
get y alone by subtraction
4+y=12
-4 -4
and you get
y=8
check your answer
4+8=12
yes?
they your good
2006-06-21 22:40:20 · answer #8 · answered by Anonymous · 0⤊ 0⤋
1)x+y=12
Answer: x=4, y=8
2)x-19 = -15
Answer: x=4
I hope that helped
2006-06-21 22:41:01 · answer #9 · answered by Ganch222222213 2 · 0⤊ 0⤋
x + y=12...
x=12-y eq 1
x-19= -15
x=4 eq 2
putting eq 2 in 1
x=12-y
4=12-y
y=8
2006-06-21 22:39:57 · answer #10 · answered by gunz 2 · 0⤊ 0⤋
x = 4
y = 8
2006-06-21 23:11:13 · answer #11 · answered by Anonymous · 0⤊ 0⤋