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
sunt 4 exerciti stie cineva va rog

Answer 1

8+a=3x8
a=24-8
a=16

(20:a+20)=5x6
20:a=30-20
a=20:10
a=2

(a:4+5)=6x2
a:4=12-5
a=7x4
a=28

a:7+(6-3)=7
a:7=7-3
a=4x7
a=28

Answer 2

(48:6+a):8=27:9 (8+a):8=3 8+a=24 a=16 (20:a+20):6=50:10 (20:a+20):6=5 20:a+20=30 20:a=10 a=2 (a:4+5):2=24:4 (a:4+5):2=6 a:4+5=12 a:4=7 a=28 a:7+(36:6-21:7)=7 a:7+(6-3)=7 a:7+3=7 a:7=4 a=28