Which statement is true? O The equation –312x + 1.2] = -1 has no solution.
The equation 3.5|6x – 21 = 3.5 has one solution.
The equation 51-3.1x + 6.9= -3.5 has two solutions.
The equation -0.313 + 8x1 = 0.9 has no solution.

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)

step-by-step explanation: