-3(r-7)-4(-7r-8)=28 Solve for R

Step-by-step explanation:

-3(r - 7) - 4(-7r - 8) = 28

-3*r - (-3)*7 -4*(-7r) - (-4)*8 = 28

-3r + 21 + 28r + 32 = 28   {bring like terms together}

-3r + 28r + 21 + 32 = 28  

25r + 53 = 28

25r = 28 - 53

25r = - 15

r = -15/25

r =-3/5

answer: 1722

step-by-step explanation:

given: the mass of saturn=

the mass of mercury=

the number of times the mass of saturn is greater than the mass of mercury

hence, the mass of saturn is 1722 times greater than the mass of mercury.