Question

Multiply both sides of the each equation in order to get the coefficient to be an integer.

45=1/2a-3

Answer 1

45 = 1/2a - 3
45 + 3 = 1/2a
48 = 1/2a
48 x 2 = a
96 = a
a = 96

Answer 2

`45= (1)/(2)a-3 //+3 \\ 48= (1)/(2) a// : (1)/(2) \\ 48: (1)/(2)=a=\ \textgreater \ 48*2=a=\ \textgreater \ a=96`
Hope that helps.Have a nice day!! ^^