4 years ago

Solve the equation.

Mathematics

1 answer:

AVprozaik [17]4 years ago

6 0

Answer:

x = $\frac{5}{8}$

Step-by-step explanation:

Given

- 4(3 + x) + 5 = 4(x + 3) ← distribute parenthesis on both sides

- 12 - 4x + 5 = 4x + 12 , that is

17 - 4x = 4x + 12 ( subtract 4x from both sides )

17 - 8x = 12 ( subtract 17 from both sides )

- 8x = - 5 ( divide both sides by - 8 )

x = $\frac{-5}{-8}$ = $\frac{5}{8}$

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3x - 3y = 9 and x + 3y = 12 Elimination

Firlakuza [10]

Answer:

$x=5.25,y=2.25$

Step-by-step explanation:

We can add the two equations to eliminate the variable $y$ and solve for $x$ :

$3x-3y+x+3y=9+12$

$4x=21$

$x=5.25$

Now, we can use substitution to solve for $y$ :

$x+3y=12$ (given)

$5.25+3y=12$

$3y=12-5.25$

$=6.75$

$y=2.25$

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jolli1 [7]

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The answer is x=6

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Step-by-step explanation:

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