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2×x+2×y+45=59 determinați 4×y+4×x+32

Răspuns :

2x+2y +45= 59
2x+2y= 59-45
2x+2y= 14

4x+4y+32
2 * (2x+2y) +32= 2*14+32=28+32= 60
2x+2y+45=59 / -45
2x+2y=14 /*2
4x+4y=28 /+32
4x+4y+32=60