Question

3x+5y=4, 2x-y=-7 solve using substitution

Answer 1

 3x+5y=4...(1)
 2x-y=-7...(2)
by(2) : y = 2x+7
subsct in (1) : 
3x +5(2x+7) = 4 
13x = - 31
x = -31/13
y = 2(-31/13)+7 = 29/13