2x - y = 30, x+2y = 40 solve using elimination method
Answers
Answered by
1
Step-by-step explanation:
2x-y=30
2(x+2y)=(40)2
2x-y=30
2x-4y=80
(-). (+). (-)
________
0+3y
Answered by
0
Answer:
x= 20 and y= 10
Step-by-step explanation:
step 1 multiply equation 2nd by 2 then, the equation is 2x + 4y = 80 by using elimination method
2x - y = 30
2x +4y = 80
- - -
-5y = -50
y = 10
put y =10 in eq 1
2x - 10 =30
2x = 40
x = 20
x = 20 , y = 10
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