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2 years ago

3x - 5y+5=04x+ 7y+8=0Please help

Mathematics

1 answer:

natima [27]2 years ago

3 0

Answer:

Y= -4. X=5

Step-by-step explanation:

This is a simultaneous equation

3x+5y= -5 ------------(1)

4x+5y= -8 ------------(2)

Using elimination method

Eliminate x

×4. 3x+5y= -5

×3. 4x+7y= -8

12x+20y= -20

-(12x+21y= -24) Minus

-y=4 therefore y= -4

Substitute x into equation 1

3x+5(-4)= -5

3x-20= -5

3x= -5+20

3x= 15

x=5

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3x - 5y+5=04x+ 7y+8=0Please help ​

3x - 5y+5=04x+ 7y+8=0Please help