9x-4y = 2000 and 7x-3y = 2000. x = ?
Answers
Answered by
1
Answer:
2000
Step-by-step explanation:
Answered by
2
Answer:
x=2000,y =4000
Step-by-step explanation:
9x-4y = 2000 ; 7x-3y = 2000
3 (9x-4y=2000) ; 4 (7x-3y = 2000)
27x-12y=6000....... (1) ; 28x-12y = 8000..... (2)
28x-12y=8000
27x-12y=6000
_ + -
__________________
X =2000
7x-3y=2000
7(2000)-3y=2000
14000-3y=2000
-3y = 2000-14000
= -12000
3y = 12000
y = 12000÷3
y = 4000
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