sorry can anybody show and explain fow to solve these simultaneosly, not english and struggling to understand what it means. thank u
2007-09-27 23:29:01 · 12 answers · asked by silvi 2 in Science & Mathematics ➔ Mathematics
12x + (2x + 2) = 18
14x = 16
x = 16 / 14
x = 8 / 7
y = 16 / 7 + 2
y = 16 / 7 + 14 / 7
y = 30 / 7
x = 8 / 7 , y = 30 / 7
2007-09-27 23:39:21 · answer #1 · answered by Como 7 · 1⤊ 0⤋
Step 1: Substitute.
12x+(2x+2)=18
Step 2: Combine like terms.
14x+2=18
Step 3: Isolate the variable. (-2 to both sides)
14x=16
Step 4: Divide.
14x/14=16/14
Step 5: Solve x=8/7 or1.14
2007-09-27 23:39:11 · answer #2 · answered by lucette s 1 · 0⤊ 0⤋
considering Y=y
in 12x+y=18, replace y by 2x+2.
>>12x+2x+2=18
>>14x=16
>>x=8/7
2007-09-27 23:37:02 · answer #3 · answered by Anonymous · 0⤊ 0⤋
In these kind of problems you should find the values of variables here x and y such that the two equations can satisfy.
here is the solution for this (these kind ) problem
y=2x+2
substitute the value of y in
2nd equation 12x+y=18
12x+2x+2=18
14x+2=18
14x=16
x=16/14
x=8/7
now substitue the value of x in 1st equation y=2x+2
y=2*8/7 +2
y=30/7
so the values of x,y are 8/7 and 30/7
2007-09-27 23:55:22 · answer #4 · answered by uday k 2 · 0⤊ 1⤋
Here's a hint... you know that y=2x+2, so you can replace the y in the second equation with that expression:
12x+2x+2=18.
Now solve for x and you have your answer. To find y, just put your value for x in the first equation.
2007-09-27 23:38:24 · answer #5 · answered by jpetraliax 2 · 0⤊ 0⤋
Just substitute and solve.
12x + (2x+2)=18
distribute
14x+2=18
subtract two from both sides
14x=16
Then just divide 14 by 16 and you'll have the answer for Y and can go back to the original equation and solve them using your new Y-value.
2007-09-27 23:38:20 · answer #6 · answered by Ferris 4 · 0⤊ 0⤋
12x+y=18
--> replace y with 2x+2
12x+(2x+2)=18
-->solve for x
12x+2x=18-2
14x=16
x=16/14=8/7
-->solve for y using 8/7=x
y=2(8/7)+2
y=(16/7)+(14/7)
y=30/7
Final Answer:
x = 8/7, y = 30/7
Graphically, the two lines shown by the equations intersect at the point (8/7, 30/7)
I hope this helps you.
2007-09-27 23:41:06 · answer #7 · answered by vpuli8 2 · 0⤊ 1⤋
y=2x+2 put this on
12x+y=18 and you have:
12x+(2x+2)=18==>
12x+2x+2=18==>
14x+2=18==>
14x=18-2 ==>
14x=16 devide both part with 14
and get
14x/14=16/14==>x=16/14
put x value at y=2x+2 and get
y=2*(16/14)+2==>
y=32/14+2==>
y=32/14+28/14 ==>
as 2=2*14/14=28/14
y=(32+28)/14==>
y=60/14
so values for x and y are:
x=18/14, y=60/14
2007-09-28 00:02:19 · answer #8 · answered by biggeo65 6 · 0⤊ 1⤋
ayusin mo muna ito sa standard form
2x-y+2=0
12x+y-18=0
i add silang dalawa
ang lalabas ay
14x-16=0
mula dito masosolve n value ng x
14x=16
14x/14=16/14
x=16/14
i lowest term
x=8/7
tapos i substitute sa kahity ano sa dalawang equation
y=2(8/7)+2
y=2+16/7
hanapin ang lcd
y=(14+16)/7
y=30/7
yan na ung values ng x and y
x=8/7
y=30/7
sana nakatulong ako sayo
2007-09-27 23:47:35 · answer #9 · answered by ijoeboy_05 2 · 0⤊ 1⤋
y=2x+2 ------- (1)
y=18-12x ----(2)
so (1)=(2)
2x +2 =18-12x
14x =16
x=8/7
y=16/7 +2
y=30/7
------------------------------------------------------------
an other way to solve it:
y=2x +2 -----(1)
y= -12x+18 ------- ×-1
-y=12x -18 ------(2)
y=2x +2
-y=12x -18
--------------------(plus)
0=14x -16
14x =16
x=8/7
put x=8/7 in (1)
y=16/7+2=30/7
2007-09-27 23:37:59 · answer #10 · answered by *~Ãya~* 4 · 0⤊ 0⤋