(5х+8)-(8х+14)=9 помогите срочно

(5х+8)-(8х+14)=95х+8-8х-14=95х-8х=9-8+14-3х=15Х=5

( 5x + 8) - ( 8x + 14) = 95x + 8 - 8x - 14 = 9- 3x - 6 = 9- 3x = 6 + 9- 3x = 153x = - 15x = - 15/3x = - 5