Question

va roooog stiu ca e tarziu dar va roog

Answer 1

x = mere
y = pere
x + y = 58kg
10x + 15y = 730kg
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x = 58 - y
15y + 10(58 - y)  = 730
15y + 580 - 10y = 730
5y = 730 + 580
y = 150 : 5
y = 30 kg, deci:

x = 58 - 30 = 28 kg

Answer 2

2 tone cartofi....3 tone ceapa...8100lei
2 tone cartofi ...7 tone ceapa ....14900
.____________________________
=tone ceapa.....4 tone ceapa . 6800
1 tona = 6800:4=1700lei
1 tona cartofi = (8100-3×1700): 2
= (8100-5100):2
= 3100:2
=1550lei