Răspuns:
x=[1,2(6)-3,5]:0,4(3)
x=[126-12/90-35/10]: 43-4/90
x=(114/90-35/10): 39/90
x=(19/15-7/2): 13/30
x=(19×2 /30 - 7×15 / 30) :13/30
x=(38-105/30)×30/13
x= - 67/30×30/13
x= - 67/13
y=[17-4,1(13)]•495
y=[ 17- (4113-41)/990]×495
y=( 17- 4072/990)×495
y=( 17- 2036/495)×495
y = [(17×495 - 2036)/495] ×495
y=(8415-2036/495) ×495
y=6379/495×495
y=6379
2x+0,15y=
2×(-67/13)+0,15×6379=
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