5*(810:9-х*3)=40*8 решите по:-)

5*(810/9-x*3)=40*8 5*(90-x*3)=320 5*(90-3x)=320 5*90-5*3x=320 450-5*3x=320 450-15x=320 -15x=320-450 -15x=-130 x= -130/*15 x=130/15 x= 26/3 = [latex] \frac{26}{3} [/latex]