Question

solve using cross multiplication 4x+3y = 17 , 3x+4y = -6 (correct answer will get brainliest)​

Answer 1

Answer:  x=8 and y=-5

Step-by-step explanation:

4x+3y=17

and 3x+6y=-6

3(x+2y)=3 * -2

x+2y=-2

4x+3y-17=0 ->(1)

x+2y+2=0 ->(2)

Here,

a_1=4, b_1=3, c_1=-17

a_2=1, b_2=2, c_2=2

x=(b_1*c_2-b_2*c_1)/(a_1*b_2-a_2*b_1)

=((3)(2)-(2)(-17))/((4)(2)-(1)(3))

=((6)-(-34))/((8)-(3))

=(40)/(5)

=8

y=(c_1*a_2-c_2*a_1)/(a_1*b_2-a_2*b_1)

=((-17)(1)-(2)(4))/((4)(2)-(1)(3))

=((-17)-(8))/((8)-(3))

=(-25)/(5)

=-5

:. x=8 and y=-5