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3 years ago

Solve for x. 3x - 1 = 27

Mathematics

2 answers:

pav-90 [236]3 years ago

4 0

Answer:

Exact Form:

x=28/3

Decimal Form:

x=9/333…

Mixed Number Form:

x=9 1/3

Step-by-step explanation:

Move all terms that don't contain x to the right side and solve.

poizon [28]3 years ago

3 0

X = 9
Move the 1 over to make it 3x = 28. The. 28/3 equals 9

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Liono4ka [1.6K]

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3 years ago

How many solutions does the following equation have? 10x-1=10x+4

zimovet [89]

Your answer is no solution.
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2 years ago

Read 2 more answers

Solve this equation for x: 2x^2 + 12x - 7 = 0

zhannawk [14.2K]

Answer:

x=0.5355 or x=-6.5355

First step is to: Isolate the constant term by adding 7 to both sides

Step-by-step explanation:

We want to solve this equation: $2x^2 + 12x - 7 = 0$

On observation, the trinomial is not factorizable so we use the Completing the square method.

Step 1: Isolate the constant term by adding 7 to both sides

$2x^2 + 12x - 7+7 = 0+7\\2x^2 + 12x=7$

Step 2: Divide the equation all through by the coefficient of $x^2$ which is 2.

$x^2 + 6x=\frac{7}{2}$

Step 3: Divide the coefficient of x by 2, square it and add it to both sides.

Coefficient of x=6

Divided by 2=3

Square of 3= $3^2$

Therefore, we have:

$x^2 + 6x+3^2=\frac{7}{2}+3^2$

Step 4: Write the Left Hand side in the form $(x+k)^2$

$(x+3)^2=\frac{7}{2}+3^2\\(x+3)^2=12.5\\$

Step 5: Take the square root of both sides and solve for x

$x+3=\pm\sqrt{12.5}\\x=-3\pm \sqrt{12.5}\\x=-3+ \sqrt{12.5}, $ or $x= -3- \sqrt{12.5}\\$x=0.5355 or x=-6.5355$

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3 years ago

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elena55 [62]

Answer:

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Step-by-step explanation:

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2 years ago

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Aleksandr [31]

X=1
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2 years ago