Question

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Answer 1

a+b+c=1000
a+b=c
a-b=200
c+c=1000
2c=1000
c=1000:2
c=500
a+b=500
a=b-500
500-b-b=200
2b=500-200
2b=300
b=300:2
b=150
a-150=500
a=500-150
a=350

Answer 2

▪Răspuns :

a + b + c = 1000
a + b = c
a - b = 200
a + b + c = 1000
c + c = 1000
2 × c = 1000
c = 1000 : 2
c = 500
a - b = 200
a = 200 + b
a + b = c
200 + b + b = 500
200 + 2b = 500
2 × b = 500 - 200
2 × b = 300
b = 300 : 2
b = 150
a + 150 = 500
a = 500 - 150
a = 350