Question

3,7x-x=0,54      3,5x+2,2x=4,56 

Answer 1

3,7x-x=0,54
2,7x=0,54|:2,7
x=0,2
3,5x+2,2x=4,56
5,7x=4,56|:5,7
x=45,6/57=0,8

Answer 2

3.7x-x=0.54
2.7x=0.54
x= 0.54/2.7
x=0.2

3.5x+2.2x=4.56
5.7x=4.56
x=4.56/5.7
x=0.8