Question

HELP PLEASEE ASAP !!

Answer 1

Answer:  x = 12

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Work Shown:

(8x-1)+(3x+9)+(3x+4) = 180

(8x+3x+3x) + (-1+9+4) = 180

14x+12 = 180

14x = 180-12

14x = 168

x = 168/14

x = 12

Note: The first equation is set up because all three angles of any triangle always add to 180.

Answer 2

Answer:

x = 12

Step-by-step explanation:

Total sum of the three angles in any triangles is 180.

In this question, we already know the angles.

So, we will have this equation.

(8x-1) + (3x+9) + (3x+4) = 180

Remove the parentheses.

8x-1 + 3x+9+ 3x+4=  180

Collect like terms and calculate the sum or difference. (I have written terms in bold letters and underlined the numbers.)

14x + 12 = 180

Now, move the constant to the right-hand side and change its sign.

14x = 180 - 12

14x = 168

We want "x", not "14x". So, divide both sides of the equation by 14.

x = 12

I hope it helps.