Question

(Could someone correct my mistake?)
Problem:Find the m 12 years ago

Answer 1

I got A as my answer but it was incorrect.

Answer 2

you have 2(x)+(x)=180

I would start with the idea that the 4 angles in a quadrilateral add up to 360 degrees
that means the angles
P+Q+R+S= 360 or , putting in the numbers or letters:
x + 90 + 2x + 90 = 360
simplify the numbers: 90+90 is 180 , so
x + 2x + 180 = 360
add -180 to both sides
x + 2x + 180 + -180 = 360 + -180

simplfy the numbers
x + 2x = 180

Answer 3

you can simplify x + 2x = 180

you have 1 x and add 2 more x's. How many x's do you have ?

Answer 4

3X'S

Answer 5

so you have 3x= 180

now divide both sides by 3
\[ \frac{3x}{3} = \frac{180}{3} \]
on the left side, 3/3 is 1, so it simplifies to just 1*x or just x
what do you get on the right side?

Answer 6

btw, when you wrote
2(x)+(x)=180
2(30)+(30)=

you put in 30 for x in 2x + x =180 to get
2 * 30 + 30 =?180

2 times 30 is 60, so this is: 60+30= ? 180
60 plus 30 is 90 , so this is: 90 = ?180
90 is not equal to 180, so x=30 is not the correct answer. You want x to be a number so this equation is true.

if you try with x=60, it will work.