Question

(a x7 -50) :30=27: 9

Answer 1

Răspuns:

(a x7-50) :30=3

a x7-50= 30 x3

ax7-50=90

ax7=90+50

ax7=140

a=140:7

a=20

Answer 2

Răspuns:

20

Explicație pas cu pas:

(a×7-50):30=27:9

(a×7-50):30=3

(a×7-50)=3×30

(a×7-50)=90

(a×7)=90+50

a×7=140

a=140:7

a=20

Verific:

(20×7-50):30=

(140-50):30=

90:30=

3✔