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Algebra/8th Grade algebra question

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Question
You you please help me Solve: 3(g+4)-5=g

Answer
The 1st thing to do here is to get rid of the parenthesis,
so multiplying the left side out gives 3g + 12 - 5 = g.

Noting that the left side has two terms the same, namely, 12 and -5,
it can be seen that 12 - 5 = 7, so we have 3g + 7 = g.

Since there is a constant with the 3g on the left and just a g on the right,
subtracting 3g from both sides will separate the g and the constant, and this gives 7 = -2g.

Now that the g is on one side and the constants are on the other, we can divide by the multiplier that is on the g term.  Dividing both sides by -2 gives -7/2 = g, so g = -7/2.

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