Need some help with math hw

x = 20

scalene triangle

Step-by-step explanation:

(4x - 5) + (3x + 5) + 40 = 180

7x + 40 = 180

7x = 140

x = 20

(4(20) - 5) = 75

(3(30) + 5) = 65

40

scalene triangle has all unequal angle measures

X= 20

Step-by-step explanation:

3x+5+4x-5+40=180

7x+40=180

7x=140

x=20

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.