Find x

3x+23+7x-37+9x-40=180

20 points

x=12.3

Combine the like terms (add the constants together and add the variables together)

The sum of the variables is 19x and the sum of the constants is -54

Add 54 to 180 and you'll get 234

Divide 234 by 19

The quotient is 12.31579

Round that to the nearest tenth and 12.3 is your answer

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

the diameter is 16 cm. are you a teacher?

step-by-step explanation: