Solve this equation (PLEASE ANSWER QUICK)

1.67

Step-by-step explanation:

1.5x*6=9x and after that you would want to get x on one side so 3.4+11.6=15 and then you would divide 9 by 15 because you want x alone on one side which gives you 5/3 or 1.66666666667

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.