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Nezavi [6.7K]
4 years ago
10

Solve the equation. ×-9=-6× + 5

Mathematics
2 answers:
Serggg [28]4 years ago
6 0
The answer is x=2. You add 6x to both sides to get 7x-9=5 then add 9 to both sides to get 7x=14. From there, you divide by 7 on both sides to get x=2.
kifflom [539]4 years ago
3 0
X - 9 = - 6x + 5

----------------------------------------------------------
Take away x from both sides :
----------------------------------------------------------
-9 = - 7x + 5

----------------------------------------------------------
Take away 5 from both sides :
----------------------------- -----------------------------
- 14 = - 7x

----------------------------------------------------------
Divide by -7 on both sides :
----------------------------------------------------------
x = 2

----------------------------------------------------------
Answer: x = 2
----------------------------------------------------------
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Oil that costs 22.50/barrel is mixed with oil that costs 35.00/barrel. How many barrels of each oil should be included in 1250 b
timama [110]
So 22.5 per barrel



so 22.5
x represents the number of 22.5 barrels

y represents the number of 35 barrels

so
x+y=1250

then find the total cost
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22.5x+35y=34375

we have 2 senctances
x+y=1250
22.5x+35y=34375

elimination
mulitply first equation by -35 to clear y
-35x-35y=-43750
add to second equation
-35x-35y=-43750
<u>22.5x+35y=34375    +</u>
-12.5x+0y=-9375
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multiply -1
12.5x=9375
divie both sides by 12.5
x=750


subsitute
x+y=1250
750+y=1250
subtract 750
y=500


750 barrells of the 22.5 oil should be included and
500 barrells of the 35 oil should be included

4 0
3 years ago
Twelve ounces of Brand X costs $1.14. Sixteen ounces of Brand Y costs $1.28. Brand X costs how much more per ounce than Brand Y.
bearhunter [10]
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The difference in cost per ounce is
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3 years ago
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Answer:

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x = -30/-6

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