Question

Date:
Hence solve the simultaneous equation
2x-y=-9 and x-4y=-8​

Answer 1

2x-y=-9 .........1

x-4y=-8.........2

form eq1

x= -8+4y

put x in eq1

2(-8+4y) -y = -9

-16 +8y -y =-9

7y = 7

y =1

put y for x

x= -8+4×1

x= -8 + 4

x= -4