Question

I will mark u brainliest please help

Answer 1

Answer:

30+(2x+7)+63=180(sum of angles of triangle )

30+2x+7+63=180

2x+100=180

2x=180-100

x=80/2

x=40

Answer 2

Answer:

$\boxed {\boxed {\sf (2x+7)+30+63= 180}}$

$\boxed {\boxed {\sf x=40}}$

Step-by-step explanation:

We are asked to write an equation to solve for x and use the equation to find x.

We know that the angles in a triangle must add to 180 degrees. Therefore, the sum of the three angles in this triangle: 30, 63, and (2x+7) must equal 180. We can set up an equation.

$(2x+7)+ 30 +63= 180$

Now we can use the equation to solve for x. First, we combine like terms on the left side of the equation. The 3 terms without variables or constants can be added.

$2x+ (7+30+63)= 180$

$2x+ (100)= 180$

We are solving for x, so we must isolate the variable. 100 is being added to 2x. The inverse operation of addition is subtraction. Subtract 100 from both sides of the equation.

$2x+100-100= 180-100 \\2x=180 -100 \\2x=80$

x is being multiplied by 2. The inverse operation of multiplication is division. Divide both sides of the equation by 2.

$\frac {2x}{2}= \frac{80}{2}$

$x= \frac {80}{2}$

$x=40$

The equation is (2x+7)+ 30+63= 180 and x is equal to 40.