Let x = the unknown number. The sum of a number and -9 (x + (-9)) is equal to (=) -20:
x + (-9) = -20
x - 9 = 20
Solve for x.
Bronson D.
asked • 08/30/17the sum of a number and -9 is equal to -20
i need the steps
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Andrew M.
08/31/17