1.3x*504-72-63*2-56*3=287280
1512x=287280+366
1512x=287646
x=190.24
2.x-1/7+x-2/8+x-3/9=570
72(x-1)+63(x-2)+56(x-3)=287280
191x=287646
x=1506
1.3x*504-72-63*2-56*3=287280
1512x=287280+366
1512x=287646
x=190.24
2.x-1/7+x-2/8+x-3/9=570
72(x-1)+63(x-2)+56(x-3)=287280
191x=287646
x=1506