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Posted by : Unknown Jumat, 03 Oktober 2014

Pengulangan Matematika
1) 4x+5=25
4x=25-5
4x=20
x=20/4
x=5

2) 7x+6=14+5x
7x-5x=14-6
2x=8
x=8/2
x=4

3) 8x-5=10+5x
8x-5x
3x=15
x=15/3
x=5

4) 12x-16=-2x+18
12x+2x=18=16
14x=34
x=34/14
x=2.42

5) 4y+25=-35
4y=135-25
4y=-60
y=-60/4
y=-15

6) 3x-7=9=-x
3x+x=9=7
4x=16
x=16/4
x=4

7) -5=2x-9
2x=-9=5
2x=-4
x=-4/2
x=-2

8) -3=2X=-9
2X=-9+3
2X=-6
X=-6/2
X=-3

9) -8=-3X+4
-8-4=-3X
-12=-3X
-12/-3 =X
4=X

10) 3X -4==7=-X
3X=X=7=4
4X=11
X=11/4

X=2,75

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