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8x + 5y = 9 3x …

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

Posted by Mananshu Pawar 6 years, 5 months ago

CBSE > Class 10 > Mathematics

4 answers

Yogita Ingle 6 years, 5 months ago

8x +5y =9 …(1)
3x +2y =4 …(2)
8x +5y =9
Subtract 8x both sides we get
5y = 9 – 8x
Divide by 5
Y = (9 – 8 x)/5 …(3)
Plug this value of y in equation second we get
3x +2y =4
3x + 2(9 – 8 x)/5) = 4
Multiply by 5 we get
15 x + 18 - 16 x = 20
-x = 2
x = - 2
Plug this value back in equation (3) we get
y = (9- 8(-2))/5
y = 25/5
y = 5

1Thank You

Rishabh Kasaudhan 6 years, 5 months ago

X=-2; y=5

1Thank You

Sid Patel 6 years, 5 months ago

By substitution method

1Thank You

Sid Patel 6 years, 5 months ago

X = -2

1Thank You

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