What value of x makes this equation true? 0.6x − 5 = 0.1x + 7

Step-by-step explanation:

0.6x − 5 = 0.1x + 7

.6x-.1x=.5x

.5x -5 = 7

7 + 5 = 12

.5x = 12

12/.5 = 24

x = 24

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.