Question

3.
и 3х – 4y = 10 ; 4х + Зу = 5 solve using eleimination
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Answer 1

Answer:

x = 2 and Y = - 1

Step-by-step explanation:

3x-4y = 10

4x+3y= 5

By elimination method

multiply 4(3х – 4y = 10 )

multiply 3(4х + Зу = 5 )

We did this in order to equalize one if the number of both the equations

thus; 12x-16y = 40

-

12x+9y = 15

+ - (change the signs)

-25y = 25

y = -1

substitute value of y = -1 in any equation of these 2

3x -4 × (-1) = 10

3x +4 = 10

3x = 10 - 4

3x = 6

x = 6/3

x = 2

THUS ; X = 2 AND Y = - 1