I agree with justaguide, the answer is x = -1/2 and y =
3
The step for solving the problem in my way
is:
We have two equations:
(1)
1/5(x-2) = 1/4 (1-y)
(2) 26x + 3y + 4 =
0
Step #1: Process the (1)
equation:
1/5 (x-2) = 1/4
(1-y)
=> (x-2)/5 =
(1-y)/4
=> 4(x-2) =
5(1-y)
=> 4x - 8 = 5 -
5y
=> 4x + 5y -8 - 5 =
0
=> 4x + 5y - 13 =
0
Gime Times 3 to (1) => 3 (4x+5y-13)
=0
=> 12x + 15y - 39 = 0
................(1*)
Give Times 5 to (2) => 5 (26x
+3y + 4) = 0
=> 130x + 15y + 20 = 0
......(2*)
(1*) and
(2*)
12x + 15y - 39 = 0
130x +
15y + 20 = 0
-
__________________
-118 x -
59 = 0 => - 118 x = 59
=> x = 59/-118 =
-1/2
Substitude x = -1/2 to either (1) or
(2)
Here I choose to substitute x = -1/2 to
(1)
=> 4x + 5y - 13 =
0
=> 4(-1/2) + 5y - 13 =
0
=> -2 + 5y - 13 =
0
=> 5y - 15 =
0
=> 5y = 15
=>
y = 15/5 = 3
Thus, the answer is x = -1/2 & y =
3
No comments:
Post a Comment