Question

Afla valoarea numerica a termenilor si a factorilor necunoscuti:
a+7x4=29
9x5+b=45
5+8-a=39
6x5-b=30
a+5x8=41

axa+39=40
axb+25=25
27+axb=27
100-axa=99
axa-axb=a

Answer 1

a+7×4=29 a×a+39=40
a+28=29 a×a=40-39
a=29-28 a×a=1
a=1
a×b+25=25
9×5+b=45 a×b=25-25
45+b=45 a×b=0
b=45-45
b=0
27+a×b=27
5+8-a=39 a×b=27-27
13-a=39 a×b=0
a=39-13
a=-26 100-a×a=99
a×a=99-100
6×5-b=30 a×a=-1
30-b=30
b=30-30 a×a - a×b=a
b=0 a=1, b=0

a+5×8=41
a+40=41
a=41-40
a=1