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What is the solution to this equation?

[tex]\[ 7x - 3(x - 6) = 30 \][/tex]

A. [tex]\[ x = 12 \][/tex]

B. [tex]\[ x = 3 \][/tex]

C. [tex]\[ x = 9 \][/tex]

D. [tex]\[ x = 6 \][/tex]


Sagot :

Sure, let's solve the equation step by step:

The original equation is:
[tex]\[ 7x - 3(x - 6) = 30 \][/tex]

First, distribute the [tex]\(-3\)[/tex] through the parentheses:
[tex]\[ 7x - 3x + 18 = 30 \][/tex]

Now, combine the [tex]\(x\)[/tex] terms on the left side:
[tex]\[ 4x + 18 = 30 \][/tex]

Next, subtract 18 from both sides to isolate the term with [tex]\(x\)[/tex]:
[tex]\[ 4x = 30 - 18 \][/tex]

Simplify the right side:
[tex]\[ 4x = 12 \][/tex]

Finally, divide both sides by 4 to solve for [tex]\(x\)[/tex]:
[tex]\[ x = \frac{12}{4} \][/tex]
[tex]\[ x = 3 \][/tex]

So the solution to the equation [tex]\(7x - 3(x - 6) = 30\)[/tex] is:
[tex]\[ x = 3 \][/tex]

Therefore, the correct answer is [tex]\( \boxed{x = 3} \)[/tex].