Question

solve it by substitution method 5x-6y=-23, 10x+7y=30​

Answer 1

Answer:

5x-6y = -23

10x+7y = 30

_________ addition

15x+y = 7

y = 7-15x

substitute y in 5x-6y = -23

5x-6(7-15x) = -23

5x-42+90x = -23

95x= 19

x = 19/95