What is the value of x?
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3x +40 = 180-(3x+x)
3x+40 =180 -4x
7x =140
x =20⁰
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Value of x is used to consider unknown value. The letter “x” is commonly used in algebra to indicate an unknown value. It is referred to as a “variable” or, in some cases, a “unknown.” In x + 2 = 7, x is a variable. ... A variable need not be “x,” but might be “y,” "w," or any other letter, name, or symbol.
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