Answer:
Solution
= −7
Explanation:
3 + 9 = − 12
3 + 9 − 9 = − 12 − 9
Subtract the numbers
3 = − 21
Divide both sides of the equation by the same term
3/3 = −21/3
Simplify each side of the equation by removing parentheses and combining like terms.
Use addition or subtraction to isolate the variable term on one side of the equation.
Use multiplication or division to solve for the variable.
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