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....... = ..........
3 7
7(4x₊1)=3(12x-3)
28x₊7=36x-9
7₊9=36x-28x
16=8x
2=x
Rpta: x=2
4x + 1 12 - 3
----------- = ------------
3 7
Multiplicamos en cruz.
7 (4x + 1) = 3 (12x - 3)
28x + 7 = 36x - 9
28x - 36x = - 9 - 7
- 8x = - 16
x = - 16/-8
x = 2
Solcuión.
x = 2