Question

solve by substitution

* 8x+5y=9
3x+2y=4

*2x+y=5
3x+2y=8

answer soon.... valid answers only

Answer 1

8x+5y=9
8x=9-5y
x=9-5y/8...(i)

3x+2y=4...(ii)

put (i) in (ii),
3(9-5y/8)+2y=4
27-15y+16y/8=4
27+y=32
y=32-27
y=5

Put y=5 in (i),
x=9-5(5)/8
x=9-25/8
x=-16/8
x= -2

Therefore, x= -2 and y= 5

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