1)а-3,2/2а+1,4=0,9/2,72)-3/9-4а=40/200

Question

1)а-3,2/2а+1,4=0,9/2,7
2)-3/9-4а=40/200

Answer 1

1)
(а-3.2)/(2а+1.4) = 0.9/2.7
(а-3.2)/(2а+1.4) = 1/3
3a - 9.6 = 2a + 1.4
a = 11
2)
-3/(9-4a) = 40/200
-3/(9-4a) = 1/5
-15 = 9-4a
-24 = -4a
a = 6