3x - x + 4 = 0
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3x - x + 4 = 0

2x = -4

x = -4 ÷ 2

x = -2

x = {0, 4}

Step-by-step explanation:Simplifying

3x(x + -4) = 0

Reorder the terms:

3x(-4 + x) = 0

(-4 * 3x + x * 3x) = 0

(-12x + 3x2) = 0

Solving

-12x + 3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3x'.

3x(-4 + x) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve:

Simplifying

x = 0

Solving

x = 0

Move all terms containing x to the left, all other terms to the right.

Simplifying

x = 0

Subproblem 2

Set the factor '(-4 + x)' equal to zero and attempt to solve:

Simplifying

-4 + x = 0

Solving

-4 + x = 0

Move all terms containing x to the left, all other terms to the right.

Add '4' to each side of the equation.

-4 + 4 + x = 0 + 4

Combine like terms: -4 + 4 = 0

0 + x = 0 + 4

x = 0 + 4

Combine like terms: 0 + 4 = 4

x = 4

Simplifying

x = 4

Solution

x = {0, 4}

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

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step-by-step explanation: