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Determină y din egalitatea : 1000-(5+2x(100+yx4)-124:4) egal 754

Răspuns :

1000-[5+2×(100+y×4)-124:4]=754
1000-[5+2×(100+4y)-31]=754
-[5+2×(100+4y)-31]=754-1000
-[5+2×(100+4y)-31]=-246
-(5+200+8y-31)=-246
-5-200-8y+31=-246
-8y=-246+5+200-31
-8y=-72 |:(-8)
y=9
Cocirmariadenis
1000-[5+2x(100+yx4)-124:4] =754
5+2x(100+yx4)-31=1 000-754
5+2x(100+yx4)-31=246
5+2x(100+yx4)=246+31
5+2x(100+yx4)=277
2x(100+yx4)=277-5
100+yx4=272:2
100+yx4=136
yx4=136-100
yx4=36
y=36:4
y=9

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