Question

What is the value of x

x=2.25
X= 11.25
x= 13
x= 22

Answer 1

D

Explanation:

Answer 2

we know that

The sum of the internal angles of a triangle must be equal to
`180` degrees

see the attached figure with letters to better understand the problem

m∠B+
`(6x+1)=180`°-----> by supplementary angles

m∠B=
`179-6x`

m∠A=
`2x+10`

m∠C=
`79`

m∠A+m∠B+m∠C=
`180`

Substitute

`(2x+10)+(179-6x)+79=180\\ -4x+268=180\\ 4x=268-180\\ 4x=88\\ x=22\ degrees`

therefore

the answer is

the value of x is equal to
`22\ degrees`