## yo, whats the answer to this equation 7x – 3 (x – 6) = 30, what’s x A. 12 B. 9 C. 3 D. 6 HELP

Question

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## Answers ( No )

The Answer is C: 3Proof:

Solve for x:

7 x – 3 (x – 6) = 30

-3 (x – 6) = 18 – 3 x:

7 x + 18 – 3 x = 30

Grouping like terms, 7 x – 3 x + 18 = (7 x – 3 x) + 18:

(7 x – 3 x) + 18 = 30

7 x – 3 x = 4 x:

4 x + 18 = 30

Subtract 18 from both sides:

4 x + (18 – 18) = 30 – 18

18 – 18 = 0:

4 x = 30 – 18

30 – 18 = 12:

4 x = 12

Divide both sides of 4 x = 12 by 4:

(4 x)/4 = 12/4

4/4 = 1:

x = 12/4

The gcd of 12 and 4 is 4, so 12/4 = (4×3)/(4×1) = 4/4×3 = 3:

Answer: x = 3