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(1+(1/2)la a 3-a -1/4):7/8=1

Răspuns :

[( 1 + 1/2)^3 - a - 1/4] :7/8 = 1
[(3/2)^3 - a - 1/4] = 7/8
27/8 - a - 1/4 = 7/8 |×8
27 - 8a - 2 = 7
8a = 25-7
8a = 18
a = 18/8
a = 9/4