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3 years ago

2x+5d-9×2c+844+233+2×+78d

Mathematics

1 answer:

goldfiish [28.3K]3 years ago

5 0

Answer:

−18c+83d+4x+1077

Step-by-step explanation:

combine all like terms

(2x+2x=4x)

(5d+78d=83d)

(-9*2c=-18c)

(1077=844+233)

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If x + 3y = 7 and x - 3y =7 , then find y<br><br> Please help me

telo118 [61]

Answer:

$x + 3y = 7 , x - 3y = 7 : y = , x = 7$

Step-by-step explanation:

$\left[\begin{array}{ccc}x + 3y = 7\\x - 3y = 7\end{array}\right]$

Isolate $x$ for $x + 3y = 7 : x = 7 - 3y$ :

Substitute $x = 7 - 3y$ :

$\begin{bmatrix}7-3y-3y=7\end{bmatrix}$

Isolate $y$ for $7 - 3y - 3y = 7 : y = 0$ :

For $x$ $=7-3y$

Substitute $y = 0$

$x=7-3 * 0$

$7 - 3 * 0 = 7$

$x = 7$

The solution to the system of equations are:

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Hope I helped. If so, may I get brainliest and a thanks?

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3 years ago

1/3+2/5= <br> what does this equal in a fraction form

SVEN [57.7K]

Answer:

11/15

hope this helps

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Step-by-step explanation:

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3 years ago

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$5.5

Step-by-step explanation:

½ × 11.00

5.5

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3 years ago

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lesantik [10]

For this case we have the following expression:

$\frac {3} {4} (\frac {1} {2} x-12) + \frac {4} {5}$

Rewriting the expression we have:

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$\frac {3} {8} x- \frac {36} {4} + \frac {4} {5}\\\frac {3} {8} x-9 + \frac {4} {5}\\\frac {3} {8} x- \frac {41} {5}\\$

Answer:

$\frac {3} {8} x- \frac {41} {5}$

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2 years ago

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Alisiya [41]

Answer:

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3 years ago

2x+5d-9×2c+844+233+2×+78d​

2x+5d-9×2c+844+233+2×+78d