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x=23+17
x=40
b)7+x=31
x=31-7
x=24
c)-5y=-35/:(-5)
y= 7
d)6y=-24/:6
y=-4
e)3x+1=25
3x=25-1
3x=24/:3
x=8
f)-3x-6=12
-3x=12+6
-3x=18/:(-3)
x=-6
g)2x+x-4=29
3x=29+4
3x= 33/:3
x=11
h)-3x+2-x=18
-x=18/:(-1)
x=-18
i)x-5+6x-7=2
x+6z=2+5+7
x+6x=14
7x=14/:7
x=2
j)2x-9-8x+11=20
2x-8x=20+9-11
-6x= 18/:(-6)
x=-3