Question

please help!! i’ll give brainliest

Solve for x.
x = [?]

Answer 1

Answer:

3x +18+4x+15=180

7x+33=180

7x=180-33

7x=147

7x÷7=147÷7

x=21

Answer 2

Answer:

$\boxed{\bf x = {21}^{o} }$

Step-by-step explanation:

We know that the sum of angles of a linear pair is always equal to 180°, they are also known as supplementary angles.

• $\sf 3x + 18 + 4x + 15 = {180}^{o}$
• $\sf 7x = 180 - 18 - 15$
• $\sf 7x = 147$
• $\sf \cfrac{ 7x}{7} = \cfrac{147}{7}$
• $\sf x = {21}^{o}$

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