Question

Afla valorile literelor a , b , c , stiind ca :
a) 10a+10b+10c=2530
a+b=196
a+c=177
b) 5a+2b+2c=70
3a+2b=44
c=3

Answer 1

a) 10*(a+b+c)=2530 => a+b+c=253

a+b=196 deci c=253-196=56

a+c=177 deci a=177-56=121

a=121 deci b=a+b-a=196-121=75

b)5a+2b+2c=70

3a+2b=44

c=3

5a+2b+2c-(3a+2b)=70-44=26

5a+2b+2c-3a-2b=26

2a+2c=26

2a+2x3=26 deci 2a=20 deci a=10

3x10+2b=44

deci 2b=14 deci b=7

Answer 2

a) 10*(a+b+c)=2530 => a+b+c=253a+b=196 deci c=253-196=56a+c=177 deci a=177-56=121a=121 deci b=a+b-a=196-121=75
b)5a+2b+2c=703a+2b=44c=35a+2b+2c-(3a+2b)=70-44=265a+2b+2c-3a-2b=262a+2c=262a+2x3=26 deci 2a=20 deci a=103x10+2b=44deci 2b=14 deci b=7