What is the value of X in this? X= 3x(4-5)+68 (for my friends, DONT RESPOND UNLESS U WANT ALOT OF NOTIFS)

Simplify the expression. -2/5(10+15m-20n)

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The volume of the sun is approximately 1 × 10^18 cu km, while the volume of jupiter is approximately 1 × 10^15 cu km. which of the following is true? a. the volume of jupiter is approximately one thousand times the volume of the sun. b. the volume of jupiter is approximately one hundred times the volume of the sun. c. the volume of the sun is approximately one thousand times the volume of jupiter. d. the volume of the sun is approximately one hundred times the volume of jupiter.