Question

Solve 2x-5y=22 and 2y-3x=-11 Evaluate the value of (3/2)x -7y+1

Answer 1

Answer:

2x-5y=22

2x-22=5y

y=(2x-22)/5--------(1)

2y-3x=(-11)

2y=3x+11

y=(3x+11)/2------------(2)

From (1) and (2) we get

(2x-22)/5=(3x+11)/2

4x-44=15x+55

-11x=99

x=(-9)

y={3(-9)+11}/2

y={-27+11)/2=(-8)

3/2(-9)-7(-8)+1

=(-27/2)+56+1

=(-27)+114/2

=87/2

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