Gravity affects the a. mass b. weight  of an object but not its a. mass  b. weight

Gravity affects the weight of an object but not its mass. An object on the earth and on the moon will have the same mass but it will weigh less on the moon than it would on earth.

Gravity affects A.weight.
mass is not be different in inertia

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].