Question

Ex. 20,21,22,23
Dau coronita îmi trebuie urgent!!!

Answer 1

20) a:b=5=>a=b×5
a-b=36=>a=b+36
a=!___!___!___!___!___!
b=!___!
a-b=36=>b=&36:4=>b=9
a=9×5=>a=45

21)p:m=4
a:m=3
n:m=2
p-m=15

a+n+m+p=?

p=4×m
a=m×3
n=m×2
p=m+15
p=!___!___!___!___!
a=!___!___!___!
n=!___!___!
m=!___!
p=m+15=>m=15:3=>m=5
n=2×5=10
a=5×3=15
p=4×5=20
Suma=20+15+10+5=50
22)a+b+c=40
a:b=3
c:a=2
a=3×b
c=2×a
b=!___!
a=!___!___!___!
c=!___!___!___!___!___!___!
40:10=4-numarul b
4×3=12-numarul a
4×6=24 numarul c
P:24+12+4=40
23)a:b=6
a:c=2
a-c=18

a=6×b
a=2×c
a=18+c
b=!__!
a=!__!__!__!__!__!__!
c=!__!__!__!
a=c+18=>b=18:3=>b=6
a=6×6=>a=36
c=3×6=>c=18