Answer:
-14x - 9y = 6
Step-by-step explanation:
If we subtract the second equation from the first, we will get this setup:
(-7x - y) - (7x + 8y) = -14x - 9y
0 - (-6) = 6
So the resulting equation -14x - 9y = 6
Answer:
- 5·$3.50 +4d = $163.50
- d = $(163.50 -5·3.50)/4 = $36.50
Step-by-step explanation:
The total purchase amount is the sum of the products of the cost of an item times the number of that item. For 5 items costing $3.50 each and 4 items costing "d" each, the total purchase amount is ...
5·$3.50 +4·d = $163.50
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This is solved by undoing what is done to the variable. The variable is multiplied by 4 and a quantity added to that product. We undo these operations in reverse order.
First we subtract the added quantity:
4d = $163.50 -5·3.50 = $146.00
Then we undo the multiplication by dividing by the coefficient of d:
4d/4 = $146.0/4
d = $36.50
The cost of one pair of shoes is $36.50.
5 : Dividend
6 : Divisor
7 : Quotient
8 : Product
<u>9 : 5550 Divided by 925 : 6</u>
<em>Hope this helps</em>