Hey!
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Steps To Solve:
3g - 10 = -45
~Add 10 to both sides
3g - 10 + 10 = -45 + 10
~Simplify
3g = -35
~Divide 3 to both sides
3g/3 = -35/3
~Simplify
g = -35/3
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Hence, the answer is

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Hope This Helped! Good Luck!