Răspuns:
Explicație pas cu pas:
inversul lui 8 = 1/8
( -8/3) + 1/8 = ( - 64 /24 ) + 3/24= ( -64 +3)/24 = - 61/24 = - 2,541(6)
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x - 0,25 = 1,75 + 3/4
x - 25/100 = 175/100 + 3/4
x - 1/4 = 7/4 + 3/4
x = 10/4 + 1/4
x = 11/4
x = 2,75
verific:
2,75 - 0,25 = 1,75 + 0,75
2,50 = 2,50√