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3x=18-6
3x=12/:3
x=4
b) 2y + 4=22
2y=22-4
2y=18/:2
y=9
c) 6 - 2a=10 - 4a
-2a+4a=10-6
2a=4/:2
a=2
d) c + 6= -4c +26
c+4c=26-6
5c=20/:5
c=4
e) a+9 = -3a +25
a+3a=25-9
4a=16/:4
a=4
f) 2x-4=4-3x
2x+3x=4+4
5x=8/:5
x=8/5
x= 1 3/5
g) - 8x+20=36
-8x=36-20
-8x=16/:(-8)
x= -2
h) 3(y+4)=9
3y+12=9
3y=9-12
3y= -3/:3
y= -1
i) 2(3m-1)=6
6m-2=6
6m=6+2
6m=8/:6
m=8/6
m= 1 2/6
m=1 1/3
j) x+12=25-x
x+x=25-12
2x=13/:2
x=6,5
3x= 12 / : 3
x=4
b. 2y=22-4
2y= 18 / : 2
y=9
c. -2a+4a=10-6
2a=4 /:2
a=2
d. c+4c=26-6
5c= 20/:5
c=4
e. a+3a=25-9
4a=16/:4
a=4
f. 2x+3x=4+4
5x=8/:5
x = 8/5
g. -8x=36-20
-8x=16 / : (-8)
x= -2
h . 3y+12=9
3y=9-12
3y= - 3 / :3
y= -1
i. 6m-2=6
6m=6+2
6m= 8 / :6
m= 8/6
j. x+x=25-12
2x= 13/ :2
x= 13/2