Răspuns:
a) a+2a=210
3a=210
a=210:3
a=70
b=70×2=140
proba:70+140=210
b)1/3×a+a=90
a/3+a=90
a+3a=90
4a=270
a=67,5
1/3×67,5=22,5
proba:22,5+67,5=90
sper că te ajuta ! spor
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Răspuns:
a) a+2a=210
3a=210
a=210:3
a=70
b=70×2=140
proba:70+140=210
b)1/3×a+a=90
a/3+a=90
a+3a=90
4a=270
a=67,5
1/3×67,5=22,5
proba:22,5+67,5=90
sper că te ajuta ! spor