Question

2.(×-1)+4=28
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Answer 1

$2(x - 1) + 4 = 28$

$2x - 2 + 4 = 28$

$2x = 28 - 4 + 2$

$2x = 26$

$x = \frac{26}{2}$

$x = 13$

verificación:

2 . (13 - 1) + 4 = 28

2 . (12) + 4 = 28

24 + 24 = 28

28 = 28