What expression could be used to solve the value of y for thiis system; 3x-5y=10 and 2x+7y=15

Question

It is multiple choice and answers are A. 3 10 2 15 ____ 3 -5 2 7 B. 10 -5 15 7 ____ 3 -5 2 7 C. 3 -10 2 -15 ____ 3 -5 2 7 D.-5 10 7 15 ____ 3 -5 2 7

Answer 1

??????????????? "solv expresshun" ?????????????

if yu "solv" sumthun, it gotta be equashun & yu giv us 2 equashuns

line 1: 3x -5y=10  or 5y=3x-10 wich become y=(3/5)x -2

line 2: 2x+7y=15

line2...2x +7[(3/5)x -2]=15

2x +(21/5)x -14=15

(27/5)x=29

27x=145

x=145/27=5.37037073737373737 or 5 & 10/27

y=(3/5)x-2 or(87/27)-2=(87-54)/27=33/27=1.22222222222222222