Examlex
Simplify, where possible.
-7y - 3(3y - 2)
Positively Charged Particle
An atom or molecule with more protons than electrons, giving it a net positive charge.
Midline
An imaginary line that divides the body into equal left and right halves.
Upward Direction
Movement or orientation towards a higher point or position.
Cell Membrane
The semipermeable membrane surrounding the cytoplasm of a cell, regulating the passage of substances in and out.
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