Question

решите уравнение 2,1*(0.9-х) =1.26

Answer 1

2,1*(0.9-х) =1.26
2,1*0,9-2,1х=1,26
1,89-1,26=2,1х
0,63/2,1=х
х=0,3

Answer 2

2.1*(0.9-х)=1.26
2.1*0.9-2.1х=1.26
1.89-2.1х=1.26
-2.1х=1.26-1.89
-2.1х=-0.63
х=-0.63:-2.1
х=0.3