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2x= -3,25-1,75
2x= -5/:2
x= -2,5
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4x-5=3x-1
4x-3x=5-1
x=4
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3x + 1/7 = 2x
3x-2x = -1/7
x= -1/7
1 3/4 + 2x =-3 1/4
2x = -3 1/4 - 1 3/4
2x = -5
x = -5/2 = -2 1/2
b)
4x - 5 = 3x - 1
4x - 3x = -1 + 5
x = 4
c)
3x + 1/7 = 2x
3x - 2x = -1/7
x = -1/7