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a fost răspuns

Rezolvati ecuatile :
a) {[(x-1) ori 2] : 3} : 4 =5
b) 1+{2 ori [3+(4+x) : 5] -6} -7=8
c) 2x+1=x+5
d) 3(x-5)+8=20

Răspuns :

Mikigabi22gabi
a) (2x-2):3]:4=5
(2x-20;3=5*4
2x-2=20*3
2x=60+2
x=62/2
x=31
b) 1+[2*(3+(4+x):5)-6]=8+7
1+[2*(3+(4+x);5]=15+6
2*(3+(4+x):5)=21-1
2*(3+(4+x))=20*5
3+(4+x)=100:2
4+x=50-3
x=47-4
x=43
c) 2x+1=x+5
2x-x=5-1
x=4
d)  3(x-5)+8=20
3x-15+8=20
3x=20+7
x=27:3
x=9

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