find the value of x so, that 3x +3:3::7x-1:5.
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Answer:
3x+3/3=7x-1/5
3x+3*5 = 7x-1*3
3x+15=7x-3
3x-7x = -3-15
-4x=-18
x = -18/-4
= -9/-2
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