How do you solve # 4x - 9 = 7x + 12 #?

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Answer 1 · 2017-01-07T19:02:08

You move the terms around to get the answer.

Let's take another look at the problem:

#4x-9=7x+12#

Using the Subtraction Property of Equality, we can subtract #4x# from both sides to turn the equation to this:

#-9=3x+12#

And then we can use the Subtraction Property of Equality again by subtracting 12 from both sides:

#3x=-21#

Then, we can use the Division Property of Equality to divide 3 from both sides, leaving the answer:

#x=-7#