Question

Find the value of x
A triangle abc a=3x+10 b=4x+20 c=5x+30

Answer 1

Answer:

10

Step-by-step explanation:

since the sum of all angles in a triangle is 180 degree therefore :

$(3x + 10) + (4x + 20) + (5x + 30) \\ = 180 \: degrees \\ (a + b + c) = 180 \: degrees \\ 12x + 60 = 180 \: degrees \\ 12x = (180 - 60) = 120 \: degrees \\ x = (120 \div 12) = 10\: degrees$

Answer 2

Answer:

Given that A = 3x+10 ,B = 4x+20 , C = 5x+30

so, A+B+C =180 (:- Sum of the triangle = 180)

= 3x+10 +4x+20 +5x+30 = 180

= 12x+60 = 180

= 12x = 180-60

= 12x = 120

$x \: = \frac{120}{12} = 10$

hence the value of x is 10