Răspuns :
A+B=35
A-B=7 —> a=b+7
B+7+b =35
2B+7 =35
2B=28 (28:2)
B=14.
A=14+7
A=21.
A-B=7 —> a=b+7
B+7+b =35
2B+7 =35
2B=28 (28:2)
B=14.
A=14+7
A=21.
Răspuns:
a+b=35
a-b=7 => a = 7+b
a+b=35, dar a=7+b => 7+b+b=35 => 7+2b=35 <=> 2b = 35-7=28 =>
b= 28:2=14
a= 14+7= 21
a x b = 21 x 14 = 294