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StefyDany
a fost răspuns

a+ b=195 stiind ca a +75=b+40

Răspuns :

Andreea839
a=195-b
195-b plus 75=b plus 40=>
-2b=40-120=> -2b=-80=> b= 40=> a=195-40=>a=155
a+b=195
a+75=b+40;
b=a+75-40;
b=a+35;
a+a+35=195;
2a=195-35; 2a=160; a=160÷2;
a=80
80+b=195; b=195-80;
b=115.
R: a=80 ; b=115.