How do you solve #232.5=-77.5s#?
s = -3
reverse the equation ( although not compulsory) to obtain.
#- 77.5s = 323.5#
now divide both sides by -77.5
#(cancel(-77.5)s)/cancel(-77.5) = 232.5/-77.5 rArr s = - 3#
Making the numbers easier: Multiply both sides by 10
To make s positive: multiply both sides by (-1)
To 'get s on its own' divide both sides by 775