Question

Ajutorr !!!! Va rog mult ajutati ma !!!!!!!!!!

Answer 1

ex)2 pag.116

a:b=b:2 r b:2:4
b:2+b:2:4=20.....=>b:2=4y....=> b=4y*2...=> b=8y
8y:2+8y:2:4=20
4y+4y:4=20
4y+y=20
5y=20
y=20:5
y=4.............=> restul =4
b=8*4
b=32...........=> impartitorul =32
c=b:2
32:2=16......=> catul =16
a=16*32+4
a=512+4
a=516.........=> deimpertitul =516

516:32=16 rest 4
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2) pag.117

30*{6+5*[4+3*(5+7*n)]}=12480
6+5*[4+3*(5+7n)]=12480:30
6+5*[4+3*(5+7n)]=416
5*[4+3*(5+7n)]=416-6
5*[4+3*(5+7n)]=410
4+3*(5+7n)=410:5
4+3*(5+7n)=82
3*(5+7n)=82-4
3*(5+7n)=78
5+7n=78:3
5+7n=26
7n=26-5
7n=21
n=21:7
n=3
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3) pag.117

b+p+m=84:3
b+p+m=28 fructe
p=b*2...=> p=2b
m=p+3...=> m=2b+3

b+2b+b+3=28
5b+3=28
5b=28-3
5b=25
b=25:5
b=5 banane
p=5*2
p=10 portocale
m=10+3
m=13 mere

5+10+13=
=15+13
=28 fructe in total
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4/ pag.117

a+a*2+a*3+a*4=260
10a=260
a=260:10
a=26

26+26*2+26*3+26*4=
=26+52+78+104
=78+182
=260
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