👤

Afla numarul necunoscut: 8×10-a=9×7. 10×2+b=6×(2×5) .c-10×7=5×6 .d+3×10=7×7


Răspuns :

80-a=63
a=80-63
a=17
20+b=60
b=60-20
b=40
c-70=30
c=70+30
c=100
d+30=49
d=49-30
d=19
Sper sa iti foloseasca !!
8x10-a=9x7
80-a=63
a=80-63
a=17

10x2+b=6x(2x5)
20+b=6x10
20+b=60
b=60-20
b=40

c-10x7=5x6
c-70=30
c=30+70
c=100

d+3x10=7x7
d+30=49
d=49-30
d=19