In an extracurricular interest group, four kinds of liquids with different known densities were filled in a plastic bucket, and then their gravity was measured with a spring dynamometer to find out th

In an extracurricular interest group, four kinds of liquids with different known densities were filled in a plastic bucket, and then their gravity was measured with a spring dynamometer to find out the weight of the bucket. It is enough to have two different liquids. Let the densities of these two liquids be ρ 1 and ρ2 respectively, the weights with barrels are m 1 and m2 respectively, the mass of barrels is m0, and the volume of barrels is v, and the equation can be obtained.

V can be obtained by subtracting two equations of the equation. You can get m0 by substituting V into the first formula of the equation. Please look at the pictures.