Solve. 2/3x = -20. a) -60 b) -30 c) -10 d) 10

Simplify 2/3x to 2x/3

2x/3 = -20

Multiply both sides by 3

2x = -20 × 3

Simplify 20 × 3 to 60

2x = -60

Divide both sides by 2

x = -60/2

Simplify 60/2 to 30

x = -30

B) -30

the answer to you question is -30

Step-by-step explanation:

what you have to do is take the fraction and multiply it by its reciprocal to get it away from the x and if you multiply on one side then you have to multiply on the other side also so you would multiply -20 by 3/2 the you would get the answer of -30

Hope this helps!!!:) can I get the Brainliest?

answer: i don't understand it

step-by-step explanation: sorry

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240