Alloy weighing 140g consists of gold and silver. The percentage of gold content in the alloy

Alloy weighing 140g consists of gold and silver. The percentage of gold content in the alloy is -20 percent. Find the mass of silver in the alloy.

Let’s take the weight of the entire alloy as 100%, and the weight of gold in the alloy as x. We make a short entry:

140 g – 100%;

x city – 20%.

The proportion is obtained: 140 / x = 100/20.

According to the rule of proportion: 100x = 140 * 20.

100x = 2800;

x = 2800/100 = 28 (g) gold in the alloy.

Let’s find the amount of silver in the alloy: 140 – 28 = 112 (g) silver.

Answer: in the alloy 112 g. Silver.