Jawabanmu

2014-02-05T18:06:45+07:00
1.) 2x+16 = x - 25
2x-x = -25-16
x=-41

2.) 43x = 22+32x
43x-32x=22
11x=22
x=22/11
x=2

3.) x-4 = 2x+4
x-2x=6+4
-X=10
x = -10

5.) 3x-7 = 5x
-7=5x-3x
-7= 2x
-7/2=x

6.) 5y=y40
5y-y = 40
4y= 40
y= 40/4
y = 10

8.)r+1=4r+7
1-7 = 4r-r
-6 = 3r
-6/3 =r
-2=r

10.) 7-2x = x+4
7-4 = x+2x
3= 3x
3/3=x
1=x
1 4 1