w₁=10%
w₂=25%
w₃=20%
m₃=800г
800г - 100%
160г - 20%
m(MgSO4)₃=160г
800г=m₁+m₂
160г=0.1m₁+0,25m₂
m₂=800-m1
160=0.1m₁+0,25(800-m1)
160=0.1x+0,25(800-x)
160=0.1x+200-0,25x
0,15x=200-160
x=800/3
m1=800/3г= 266,67г
w₁=10%
w₂=25%
w₃=20%
m₃=800г
800г - 100%
160г - 20%
m(MgSO4)₃=160г
800г=m₁+m₂
160г=0.1m₁+0,25m₂
m₂=800-m1
160=0.1m₁+0,25(800-m1)
160=0.1x+0,25(800-x)
160=0.1x+200-0,25x
0,15x=200-160
x=800/3
m1=800/3г= 266,67г