To solve the equation, it is necessary to isolate the unknown variable "x" first. This is done as shown below:

2x - 3 = 15

Adding 3 to both sides of the equation:

2x - 3 + 3 = 15 + 3
2x = 18

Dividing 2 from both sides:

2x/2 = 18/2
x = 9

Among the choices, the correct answer is B.

5 0

4 years ago

I need help. How do i solve this?

Sphinxa [80]

Answer:

Step-by-step explanation:

Cool

7 0

3 years ago

Which expression shows the correct way to expand (6x-6)^2?

jeka94

Answer:

$(6x -6)^{2} = (6x +6)(6x +6) = 36x^{2} -72x + 36$

Step-by-step explanation:

Even if I don't know the options I can give all the option that will be right for expending this. Just look at each step and see which one is one of the options.

$(6x -6)^{2} = (6x +6)(6x +6) = 36x^{2} -72x + 36$

5 0

3 years ago

Simplify when x=4 x^2-4

Nuetrik [128]

Answer:

Step-by-step explanation:

X=4
$\sf \rightarrowtail \: {x}^{2} - 4 \\ \sf \rightarrowtail \: {(4)}^{2} - 4 \\ \sf \rightarrowtail \: 16 - 4 \\ \sf \rightarrowtail \: 12$

6 0

3 years ago

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