the pair of equation 5 x minus 15 by equals to 8 and 3 X + 9 Y = 24
Answers
Answered by
1
Step-by-step explanation:
5x-15y=8 ;. 3x+9y=24
solving eq .i we get
5x=8+15y
x=(8+15y)/5
putting the value of x in eq.ii we get..
3{(8+15y)/5+9y=24
=24/5+9y+9y=24
=18y=24-24/5
=18y=96/5
=y=96/(5×18)
y=20/5=4
x=(8+15y)/5
=x=(8+15×4)/5
=x=68/5
Answered by
1
Answer:
X = 24/5 & Y = 16/15
Step-by-step explanation:
3 X + 9 Y = 24 .....(1)
5 X - 15 Y = 8 .....(2)
Now multiply (1) by 5 & (2) by 3 :-
15X + 45Y = 120
15X - 45Y = 24
----------------------------
30X = 144
X = 144/30 = 48/10 = 24/5
Y = (24-3X)/9
Y = [ 24-3*(24/5) ]/9
= [ 120 -72 ]/45
= 48/45
= 16/15
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