Solve the equation x-0.8x = 6012.4 (x-2.6) = 6.2

Solve the equation x-0.8x = 6012.4 (x-2.6) = 6.2

1、x-0.8x=60
x(1-0.8)=60
0.2x=60
x=300
2、12.4x-12.4*2.6=6.2
12.4x=38.44
x=3.1