Question

Afla numarul necunoscut 7*c=77 a*5=45 r+35*5=200 123*5-t=310

Answer 1

7*c=77
c=77:7
c=11

a*5=45
a=45:5
a=9

r+35*5=200
r+40=200
r=200-40
r=160

123*5-t=310
615-t=310
615-310=t
305=t
t=305