-2 2/5*(-3/8х+1/4)=4,5
решите уравнение

-2 2/5*(-3/8х+1/4)=4,5
-3/8х+1/4=4,5÷(-2 2/5)
1/4-3/8х=-4 5/10÷2 2/5
1/4-3/8х=-45/10÷12/5
1/4-3/8х=-45/10×5/12
1/4-3/8х=-15/2×1/4
1/4-3/8х=-15/8
3/8х=1/4-(-1 7/8)
3/8х=1/4+1 7/8
3/8х=2/8+1 7/8
3/8х=1 9/8
х=1 9/8÷3/8
х=17/8÷3/8
х=17/8×8/3
х=17×1/3
х=17/3
х=5 2/3

-2  *(-x+)=4,5
-(-x + ) = 4,5
x -  = 4,5
x -  = 4,5 |*40
36x - 24 = 180
36x=204
x = 
x = 5