(5х-10х) +18*(5х-10)+15х=5 -(4х+34)-х+39+10х=74 решить уравнения

-(5х-10х) +18*(5х-10)+15х=5
- ( - 5х ) + 18( 5x - 10 ) + 15x = 5 
5x + 90x - 180 + 15x = 5 
110x = 5 + 180 
x = 185 : 110 
x = 1 75/110 
x = 1 15/22 

-(4х+34)-х+39+10х=74
- 4x - 34 - x + 39 + 10x = 74 
5x = 74 - 5 
x = 69 : 5 
x = 13,8