Question

ajutor

a)12×a=144
b)b÷3=4rest5
c)(100-b÷3)×5=490​

Answer 1

Răspuns:

a=12

b=17

b=6

Explicație pas cu pas:

12a=144=>a=144:12=>a=12

b÷3=4rest5=>b=3x4+5=>b=12+5=>b=17

(100-b÷3)×5=490​=>100-b÷3=98=>b÷3=100-98=>b÷3=2=>b=2x3=6

Answer 2

Răspuns:

Explicație pas cu pas:

a)12×a=144

a= 144 : 12

a=12

b)b÷3=4rest5

b-5= 4*3

b-5= 12

b= 12+5

b=1 7

c)(100-b÷3)×5=490​

100 - b :3 = 490 :5

100 -b : 3 = 98

-b : 3= 98-100

b : 3 =2

b=2*3

b= 6

Succes !