Oblicz x
2*[x-(80-x)]=[2*(80-x)]-[x-(80-x)]
*-znak mnozenia
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2*[x-80+x]=[160-2x]-[x-80+x]
2*(2x-80)=160-2x-x+80-x
4x-160=240-4x
8x=400
x=50
2*[x-80+x] = [160 - 2x] - [ x-80+x]
2*[ 2x -80 ] = 160 - 2x -[ 2x - 80 ]
4x - 160 = 160 - 2x -2x +80
4x+4x = 240+160
8x = 400 /:8
x = 50
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2*[x-80+x]=[160-2x]-[x-80+x]
2*(2x-80)=160-2x-x+80-x
4x-160=240-4x
8x=400
x=50
2*[x-(80-x)]=[2*(80-x)]-[x-(80-x)]
2*[x-80+x] = [160 - 2x] - [ x-80+x]
2*[ 2x -80 ] = 160 - 2x -[ 2x - 80 ]
4x - 160 = 160 - 2x -2x +80
4x+4x = 240+160
8x = 400 /:8
x = 50