Answers:
k-3/4= 10
move -3/4 to the other side
sign changes from -3/4 to +3/4
k-3/4+3/4= 10+3/4
k= 10+3/4
find the common denominator for 10. Pretend that 10 has a denominator which is 1.
The common denominator is 4. Mutiply by 4 for 10/1
10(4)= 40
1(4)= 4
k= 40/4+ 3/4
k= 43/4 and k= 10 3/4
9+t/12=3
mutiply both sides by 12
12(9)= 108
t/12*12- cross out 12 and 12, divide by 12 and then becomes t
3(12)=36
108+t=36
move 108 to the other side
108-108+t= 36-108
t= -72