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1pe8 + 1pe2 × (2x-1)= 2x-1pe8×(8x-1)-1pe4×(4x-2)

Răspuns :

1/8+1/2×(2x-1)=2x-1/8×(8x-1)-1/4(4x-2)
1/8+2x/2-1/2=2x-8x/8+1/8-4x/4+2/4
1/8+x-1/2=2x-x+1/8-x+1/2 |-1/8
x-1/2=1/2
x=1/2+1/2
x=2/2
x=1