75 = g - 9 + 5g
75=g+5g-9 ( combine like terms)
75=6g-9
move -9 to the other side
sign changes from -9 to +9
75+9=6g-9+9
75+9=6g
84=6g
divide both sides by 6 to get g by itself
84/6=6g/6
cross out 6 and 6, divide by 6 and then becomes 1*1*g=g
g=84/6
answer;
g=14