3x+6=30 what is the value of x​

×=12

Step-by-step explanation:

30+6= 36

36÷3=12

hope it helps

x = 8

Step-by-step explanation:

3 times 8 equals 24, then add 6 to 24 then you get 30. Hope this helps :D

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.