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Combine large like terms to create an equivalent expression: 4z-(-3z)
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Combine large like terms to create an equivalent expression: 4z-(-3z)

User Thomas Steinbach
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Note that "subtracting a negative" is the same thing as "adding a positive" ; → " 4z - (-3z) = 4z + 3z = 7z . The answer is: " 7z " .
User Reggaemuffin
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