Solve for x, if. 3(x-8)-5=9(x+2)+1 the answer is 7.166 but i don't know how they got it
2 answers:
The answer and workings are in the document below. Please open it up in a new window to see it in full.
<span><u>3(x - 8) - 5 = 9(x + 2) + 1</u></span>
First, you have to get rid of the parentheses:
3(x - 8) is the same as 3x - 24, so the left side is 3x - 29 .
9(x + 2) is the same as 9x + 18, so the right side is 9x + 19 .
Now, the equation is: 3x - 29 = 9x + 19
Subtract 19 from each side: 3x - 48 = 9x
Subtract 3x from each side: - 48 = 6x
Divide each side by 6 : <u> - 8 = x </u>
(I guess the answer is <em>not</em> 7.166 after all.)
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