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stiind ca 2x+2•y+45=59,determinati 4•y+4•x+32 va roog urgent. dau coroana

Răspuns :

2x+2y=59-45
2x+2y=14
x+y=7
4x+4y=28
4x+4y+32=28+32
4a+4y+32=60