Simultaneous equations

Question 1

Solve 3x+4y=5,7x-3y=2 by elimination

Answer 1

9x+12y=15,28x-12y=8
37x=23
x=23/37
y=29/37

Question 2

Solve 3x+4y=5,7x-3y=2 by substitution

Answer 2

x=(2+3y)/7
3((2+3y)/7)+4y=5
(6+9y)/7+4y=5
6+9y+28y=35
37y=29
y=29/37
x=23/37