Question 911235
a+b=60,
1*a+2*b=100
a=60-b
1*(60-b)+2*b=100
60-1b+2*b=100
1*b=40
b=40
a=60-b
a=20 at 1 point and  b=40 at 2 points
check
20+40=60
1*a+2*b=100
1*20+2*40=100
20+80=100
100=100
ok
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