Sebelum membaca jawaban nya Tulis dulu pak
Nama: Mustofa Hilmi
No:24
UPDATE : {Saya tealah tidak mengaktifkan sistem Copy Paste agar tidak ada kecurangan}
No 2
G.)
x+y =g---------------->PERSAMAAN 1
x =9-y-------------->PERSAMAAN 2
2x+1=x+y
2x-x-y=-1
x-y =-1-------------->PERSAMAAN 3
Subsitusikan x dari persamaan 2->3
x-y=-1
(9-y)-y=-1
-2y =-10
y = 5
Subsitusikan y=5 ke persamaan 2
x= 9-y
x=9-5=4
HP {(4,5)}
H.)
x-y=y----------------->PERSAMAAN 1
2(x-y+y) =15
2x-2y+y=15
2x-y=15--------------->PERSAMAAN 2
-y=15-2N
y=-15+2x ---------> PERSAMAAN 3
Subsitusikan nilai y dari persamaan dari persamaan 3->1
x-y=y
x-(-15-2x)=-15+2N
x+15 -2x =-15-15
x-4x =-30
-3x =-30=10
Subsitusikan x= 10 ke persamaan 3
y=-15+12x
y=-15+2 (10)
y=-15+20=5
HP {10,5}
G.)
x+y =g---------------->PERSAMAAN 1
x =9-y-------------->PERSAMAAN 2
2x+1=x+y
2x-x-y=-1
x-y =-1-------------->PERSAMAAN 3
Subsitusikan x dari persamaan 2->3
x-y=-1
(9-y)-y=-1
-2y =-10
y = 5
Subsitusikan y=5 ke persamaan 2
x= 9-y
x=9-5=4
HP {(4,5)}
H.)
x-y=y----------------->PERSAMAAN 1
2(x-y+y) =15
2x-2y+y=15
2x-y=15--------------->PERSAMAAN 2
-y=15-2N
y=-15+2x ---------> PERSAMAAN 3
Subsitusikan nilai y dari persamaan dari persamaan 3->1
x-y=y
x-(-15-2x)=-15+2N
x+15 -2x =-15-15
x-4x =-30
-3x =-30=10
Subsitusikan x= 10 ke persamaan 3
y=-15+12x
y=-15+2 (10)
y=-15+20=5
HP {10,5}
No 3
G.)
3(x+y)-2x = 19 -> 3x+3y-2x =19 -> x+3y=19
5x-3(x+y) = 22 -> 5x-3y-3x =22->2x-3y=22 +
3x =3x =41
x = 41
3
x +3y =19
41 +3y=19
3
3y=19 - 41
3
y= 16----------> Hp {(41 , 16)}
3
H.)
4(x-3y)+7y=5-->4x -12y+ 7y =5 -> 4x-5y =5
9y-4(x-3y)=43-->9y-14x+12y=43->-4x+21y=43 +
16y =48
y =48
16
y =3
4x-5y =5
4x-5(3) =5
4x-15 =5
4x =5+15
4x =20
x =20 =5 HP = {5,3}
4
4 .
D.)
2 (x +2) -1 (y+3) =5
3 4
8(x+2) -3(y+3) =5
12
8x+16-3y-9 =5
12
8x-3y =53
3 (x+1) + (2y+1) =7,5
4 2
3(x+1) +2 (2y +1)=7,5
4
3x+3+4y+2 =7,5
4
3x+4y+5=30
3x+4y =25-------->2
Eliminsi nilai x
8x -3y=53 | x3 | 24x-9y =159
3x +4y=25| x8 | 24x+32y=200
-41 y= -41
y= 1
3x+4y =25
3x+4(1)=25
3x =25-4
x =21 =7
3
HP { 7,1 }
1(x+y)=15
2
3(x+y)=15
2
3 x+ 3y=15
2 2
3x+ 3y=15
2
3x+3y=30------------->PERSAMAAN 1
3 (2x-y)=14
11
14 (2x-y)=14
11
28 x- 14 y=14
11 11
28x-14y=14
11
28x-14 y=154
2x - y =11------------>PERSAMAAN 2
Eliminiasi nilai y
3x+3y=30|X1| 3x+3y =30
2x+y=11 |X3| 6x-3y =22 -
9x =63
x =7
2x-y =11
2 (7)-y =11
14-y=11
-y =11-14
y =3
HP {7,3}
9y-4(x-3y)=43-->9y-14x+12y=43->-4x+21y=43 +
16y =48
y =48
16
y =3
4x-5y =5
4x-5(3) =5
4x-15 =5
4x =5+15
4x =20
x =20 =5 HP = {5,3}
4
4 .
D.)
2 (x +2) -1 (y+3) =5
3 4
8(x+2) -3(y+3) =5
12
8x+16-3y-9 =5
12
8x-3y =53
3 (x+1) + (2y+1) =7,5
4 2
3(x+1) +2 (2y +1)=7,5
4
3x+3+4y+2 =7,5
4
3x+4y+5=30
3x+4y =25-------->2
Eliminsi nilai x
8x -3y=53 | x3 | 24x-9y =159
3x +4y=25| x8 | 24x+32y=200
-41 y= -41
y= 1
3x+4y =25
3x+4(1)=25
3x =25-4
x =21 =7
3
HP { 7,1 }
1(x+y)=15
2
3(x+y)=15
2
3 x+ 3y=15
2 2
3x+ 3y=15
2
3x+3y=30------------->PERSAMAAN 1
3 (2x-y)=14
11
14 (2x-y)=14
11
28 x- 14 y=14
11 11
28x-14y=14
11
28x-14 y=154
2x - y =11------------>PERSAMAAN 2
Eliminiasi nilai y
3x+3y=30|X1| 3x+3y =30
2x+y=11 |X3| 6x-3y =22 -
9x =63
x =7
2x-y =11
2 (7)-y =11
14-y=11
-y =11-14
y =3
HP {7,3}
0 komentar:
Posting Komentar