Question

ex35 e si f
va roggggggggggggggggggg
acord 34 puncte

Answer 1

e) a+b=40  ⇒b=40-a
2a+b=65
2a+40-a=65
a+40=65
a=65-40
a=25
b=40-a
b=40-25
b=15
f)a-b=25⇒a=25+b
b+3×a=375
b+3 ×(25+b)=375
b+3×25+3×b=375
b+75+3×b=375
4b+75=375
4b=375-75
4b=300
b=300÷4
b=75
a=25+b
a=25+75
a=100

Answer 2

e)1 numar-25    Suma lor=40
   2 numar-15     25x2+15=65
f)375-25=350
350:2=175(1 numar)            175+200=375(suma numerelor)
375-175=200(2 numar)        200-175=25(diferenta numerelor)

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