Question

Daca a:b=21
a)5a:b=
b)(a+b):b=
c)(a-b):b
d)(7a+3b):b
DACA SE POATE DETALIAT​

Answer 1

Răspuns:

a:b=21=>a=21b

5a:b=5·21b:b=105b/b=105

(a+b):b=(21b+b):b=22b/b=22

(a-b):b=(21b-b)/b=20b/b=20

(7a+3b):b=(7·21b+3b)/b=150b/b=150

Answer 2

A)= 5×21= 105

B)= (a÷b)+ (b÷b)= 21+1= 22

C= a÷b-b-b= 21-1= 20

D)= 7×a÷b+ 3×b÷b=

=> 7×21+ 3×1= 147+3= 150