Can someone help me with these ?

Which linear equations have an infinite number of solutions? check all that apply.  (x  –  3/7)  =  2/7(3/2x  –  9/14)8(x  +  2)  =  5x  –  1412.3x  –  18  =  3(–6  +  4.1x)(6x  +  10)  =  7(x  –  2)4.2x  –  3.5  =  2.1 (5x  +  8)

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation