Question

(48:6+a):8=27:9
(20:a+20):6=50:10
(a:4+5):2=24:4
a:7+(36:6-21:7)=7
(64-3x8-5xa):2=10
Ajutati-ma va rog!​

Answer 1

(48:6+a):8=27:9 (20:a+20):6=50:10

(8+a):8=3 (20:a+20):6=5

8+a=3×8 20:a+20=5×6

8+a=24 20:a+20=30

a=24-8 20:a=30-20

a=16 20:a=10

a=20:10

a=2

(a:4+5):2=24:4 a:7+(36:6-21:7)=7

(a:4+5):2=6 a:7+(6-3)=7

a:4+5=6×2 a:7+3=7

a:4+5=12 a:7=7-3

a:4=12-5 a:7=4

a:4=7 a=4×7

a=7×4 a=28

a=28