Răspuns :

Maria12793747id

Răspuns:

15+143+2x+6=2×-57×100+648

2x=-114×100+648-15-143-6

2x=11400+648-15-143-6

2x=11884

x=11884:2

x=5942

Explicație pas cu pas:

cred ca e corect

Anonim3618id
15+143+2•(x+3)=2•(72-15)•100+18•36
198+2•(x+3)=2•57•100+648
198+2•(x+3)=114•100+648
198+2•(x+3)=11400+648
198+2•(x+3)=12048
12048-198=2•(x+3)
2•(x+3)=11850
11850:2=x+3
x+3=5925
x=5925-3
x=5922

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