The answer is (7/9, -5/9)
(7 over 9 and negative 5 over 9)
Answer:
$30
Step-by-step explanation:
We know that the cost of all of the books was 228 - 18 = 210 dollars because Mike had 18 dollars left over. Assuming that each book cost the same amount, we know that each book costs 210 / 7 = $30.
Setting up the equation
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1)Add two x and four x together on the left side. On the right, add 10 and 7.
6x+3=17-x
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Solve:
2)Add x to both sides.
7x+3=17
3) Minus 3 from both sides
7x=15
Divide 15 by seven.
x=<span> 2.14285714286
</span>Hope this helped! Have a happy holiday!