The depth of the channel was 7 m. Due to the fact that this channel was watered, the field depth changed

The depth of the channel was 7 m. Due to the fact that this channel was watered, the field depth changed by -0.8 m. How many meters is the depth of the channel?

The unknown depth of the channel, which became after irrigation of the field, is denoted by the conditional variable “Y”.
By the second step, using the conditions of this example, we make the following equation: Y + 0.8 = 7.
As a result of solving this equation, we have the following Y = 7 – 0.8 = 6.2 meters.
Answer: the depth of the canal became 6.2 meters.