Question

solve the simultaneous equation :4x+3y=11;3x+4y=10 ​

Answer 1

3x= 4y+10 multiply this equation through by 4 = 12x = 16y + 40 (1)

4x= -3y+11 multiply this equation through by -3 = -12x = 9y - 33 (2)

Add equations (1) and (2)

0 = 25y + 7 subtract 7 from both sides

-7 = 25 y divide both sides by 25

-7/25 = y

And substituting this value for y into (1) to find x, we have

3x = 4(-7/25) + 10

3x = -28/25 + 250/25

3x = 222/25 divide both sides by 3

x = 222/75 = 74/25

So {x, y} = { 74/25 , -7 / 25 }

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Answer 2

Answer:

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Step-by-step explanation:

x=2

y=1