The basic law of the equation: the relationship of the equation remains unchanged when both sides of the equation add, subtract, multiply and divide a non-zero number at the same time.

It depends on your understanding of the equation. Imagine all these symbols as a number. It would be easier to understand if you had studied equations.

1，△+port =48 △= port+port △ = () port =()

Solution: Substitute △ = port+port into equation △+port =48, and get: port+port+port =48.

3 ports =48, ports = 16, △=32.

2. There is something wrong with this condition, which may be △+○=64.

○+mouth =82 △+○=64 △+ mouth = 48 △ = () △ = ()

Solution: subtract 64 from both sides of the equation χ+χ =82 (△ +χ = 64).

+Kou -64=82-64

○+port -△-○= 18

Mouth -△= 18

Add 48 to both sides of the equation (△+mouth =48).

Mouth-△ +△+Mouth = 18+48

Two months =66

Mouth =33

△= 15

○=49