Five less than four times a number x is nine more than twice the number. what is the number?

The number is 7.

Step-by-step explanation:

4x-5=2x+9

4x-2x-5=9

2x-5=9

2x=9+5

2x=14

x=14/2

x=7

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1