Question

if x= -4 and y = 3 then find tbe value of 7x - 2x +1​

Answer 1

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Answer 2

QUESTION:

• if x= -4 and y = 3 then find tbe value of 7x - 2x +1

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What are variables?

• Variable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation. Commonly used variables include x and y (real-number unknowns), z (complex-number unknowns), t (time), r (radius), and s (arc length).

• In mathematics, a variable is a symbol or letter, such as "x" or "y," that represents a value. ... For example, a variable of the string data type may contain a value of "sample text" while a variable of the integer data type may contain a value of "11".