(5,12+x)*0,14=8,4   2,472:(30-y)=0,12 
 
(x-4,7)*3,4=12,92    12,7-4,5x=8,29

Помогите пажадуйсто

(5,12+x)*0,14=8,40,7168 + 0,14x = 8.40.14x = 7.6832x = 54. 88(x-4,7)*3,4=12,92   x - 4.7 = 12,92 : 3.4x - 4.7 = 3.8x = 8.512,7-4,5x=8,294,5x = 12.7 - 8.294.5x = 4.41x = 0.982,472:(30-y)=0,1230 - y = 2.472 : 0,1230 - y = 20.6y = 9.4