This natural resource supports the economy of many nations in the region. diamonds oil salt soil

Oil resource.

Explanation:

Most of the middle eastern nations n the world are supported by the oil and the natural gas and these are resources that help the nations such as the Arabian Gulf countries that are rich in its resources and oi resource is also found inland of the south Americas  Venezuela and the Colombia and they are other African countries at are rich in the resource as niger, Algeria and the other Russian countries of the world.

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].