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julsineya [31]
3 years ago
5

(-2x+y=8) minus (5x-y=6)

Mathematics
2 answers:
Elis [28]3 years ago
8 0
-2x+y - (5x-y) = 8-6 <=>

-2x+y-5x+y = 2 <=>

-7x + 2y = 2
Hitman42 [59]3 years ago
6 0

Answer:-7x+2y=2

Step-by-step explanation:

(-2x+y=8)-(5x-y=6)

(-2x+y=8)> this side change since it’s negative

(-2x+y=8) - (-5x+y=-6)

-7x+2y=2

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3 years ago
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3x -9 =7x + 12<br>Find X
Lorico [155]
Simple....

you have:

3x-9=7x+12

To even solve this....isolate the variable your are trying to solve for....

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5 0
3 years ago
One cylinder has a volume that is 8 Centimeters cubed less than StartFraction 7 over 8 EndFraction of the volume of a second cyl
mojhsa [17]

The correct equation is:

216 = \frac{7}{8} \times x - 8

The volume of second cylinder is 256 centimeter cubed

<em><u>Solution:</u></em>

Given that,

One cylinder has a volume that is 8cm less than 7/8 of the volume of a second cylinder

The first cylinder’s volume is 216 centimeter cubed

From given,

Let "x" be the volume of second cylinder

Therefore,

Volume of first cylinder = 7/8 of the volume of a second cylinder - 8

216 = \frac{7}{8} \times x - 8

216 = \frac{7x}{8}-8\\\\216 = \frac{7x-64}{8}\\\\7x - 64 = 8 \times 216\\\\7x - 64 = 1728\\\\7x = 1728 + 64\\\\7x = 1792\\\\Divide\ both\ sides\ by\ 7\\\\x = 256

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