Oblicz 28(x zl+2,5x zl+5 zl+2x zl+4,4 x zl- 1,5 x zl)
28(8,4x+5)=235,2x+140
28(xzl+5zl+2xzl+4,4xzl-1,5xzl)=
28xzl+140zl+46xzl+123,2xzl-42xzl=
28xzl+46xzl+123,2xzl-42xzl=-140zl
155,2xzl=-140zl
xzl=-140/155,2
xzl=-0,9zl
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28(8,4x+5)=235,2x+140
28(xzl+5zl+2xzl+4,4xzl-1,5xzl)=
28xzl+140zl+46xzl+123,2xzl-42xzl=
28xzl+46xzl+123,2xzl-42xzl=-140zl
155,2xzl=-140zl
xzl=-140/155,2
xzl=-0,9zl