Question

afla termenul necunoscut
a)1*2*3*a=24
b)b*2*5=40
c)c:2:3=5
d)r*r+648=7*100+2*10+3*3

Answer 1

1x2x3xa=24
6a=24
a=4

10b=40
b=4

c=5x3x2
c=30

r la 2+648=700+20+9
r la 2+648=729
r la2=729-648
r la 2=81
r=9