Răspuns:
Explicație pas cu pas:
0,2=2⁽²/10⁽²=1/5
0,5=5⁽⁵/10⁽⁵=1/2
x/5=y/2=K
x/5=K→x=5K
y/2=K→y=2K
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4x-3y=252
4*5K-3*2K=252
20K-6K=252
14k=252
k=252:14
k=18
x=5K=5*18=90
y=2K=2*18=36
