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a fost răspuns

Calculati E daca:
a)E=a+2b+3c+4d si a+b+c+d=36
b+c+d=20
c+d=15
d=a:2+b:5

Răspuns :

Nao23
a+b+c+d=36
a+20=36
a=36-20
a=16

b+c+d=20
b+15=20
b=20-15
b=5

d=a÷2+b÷5
d=16÷2+5÷5
d=8+1
d=9

c+d=15
c+9=15
c=15-9
c=6

a+b+c+d=16+5+6+9=36



Agaby17
c+d =9+8=15
a:2=14:2=7
b:5=5:5=1
d= 7+1=8
a=14
b=5
c=9
d=8
E=14+2*5+3*9+4*8=14+10+27+32=83

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