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3x+4=165-2x
3x+2x= -4+165
5x= 161 |:5
x=32,2
2)
16(x+2)= 25(x-4)
16x + 32= 25x- 100
16x-25x=-32-100
9x=-132 |:9
x=-132/9= -44/3= - 14 2/3
3)
2x+1=16x+14
2x-16x=-1+14
-14x=13 |(-14)
x=- 13/14
3x+2x=165-4
5x= 161 | :5
x =32,2
b) 16x+32=25x-100
16x-25x=-100-32
-9x=-132 |:(-9)
x= 14,7
c) 2x+1=16x+14
2x-16x=14-1
-14x=13 |:(-14)
x=-13/14