Question

02 Solve the following pair of linear eq by elimination method ...

1. 3 x - 8y = - 2 and 9 X + 4 y = 8

2. x\6 + y\15 = 4 and x\3 - y\12 = 19\4

3. 0.5 - 0.1 y = 0.7 and 1.5 X + 0.3 y = 3.9

4. ax + by = b - a and bx - ay = -(a+b) ​

Answer 1

1. 3x - 8y = -2•••••••••••(1)

9x + 4y = 8•••••••••••(2)

equation (1)*3

=9x- 24y= -6•••••••••(3)

equation (2)-(3)

9x + 4y = 8

9x - 24y = -6

(-) (+) (+)

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28y=14

y=14/28

y=1/2

put y in (2)

3x - 8*1/2 = -2

3x - 4 = -2

3x = -2+4

3x = 2

x = 2/3

Therefore x = 2/3 and y = 1/2

Answer 2

Answer:

Step-by-step explanation: