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2x + 3 = 3x - 4
7 = 5x
1.2 = x
* * * * *
Not quite right, I'm afraid:
the correct answer is x = 7.
Here's one way to find it:
2x + 3 = 3x - 4.
Then,
2x + 3 - 3x + 4 = -x + 7 = 0, and
x = 7,
which is the answer we sought.
Checking, we try substituting 7 for x,
in the original equation:
Does 2x + 3 = 3x - 4, when x = 7?
Let's try:
2(7) + 3 = 17, and
3(7) - 4 = 17.
Yes, it does;
thus assuring us that our answer is correct.
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∙ 13y ago
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