Question

Solve the following systems of equations:
3x – 7y + 10 = 0
y – 2x – 3 = 0

Answer 1

Answer:

x=(-1); y=1

Step-by-step explanation:

3x-7y=-10--------1st eqn

-2x+y=3---------2nd eqn

Multiply 2nd eqn by 7 and add it with 1st eqn

3x-7y=-10

-14x+7y=21

(+)

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-11x=11----------3rd eqn

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3rd eqn implies that x=(-1)

Substitute the value of x in 1st eqn (or in 2nd eqn)

-3-7y=-10

-7y=-7

y=1