Question

solve by equation coefficients. 2x-y=23. 4x+3y=48​

Answer 1

Answer:

Step-by-step explanation:

2x-y=23 → equation 1

equation 1 ×2

⇒4x-2y=46 → equation 2

4x+3y=48 → equation 3

equation 3 -equation 2

⇒5y=2

⇒y=2/5

from equation 1

⇒2x-2/5 = 23

⇒2x=23+2/5

⇒2x=117/5

⇒x=117/10

⇒x=11.7

∴x=11.7,y=2/5⇒y=0.4

Answer 2

Answer:

x= 117/10 ; y= 2/5

Step-by-step explanation:

here

(a)1 = 2 ; (b)1 = -1 ; (c)1 = -23

(a)2 = 4 ; (b)2 = 3 ; (c)2 = -48

Applying cross multiplication formula ,

x÷(b1*c2 - b2*c1) = y÷(c1*a2 - c2*a1) = 1÷(a1*b2 - a2*b1)

x/( 48 - (-69) ) = y/( -92 + 96 ) = 1/( 6 + 4 )

x/117 = y/4 = 1/10

x/117 = 1/10 & y/4 = 1/10

x = 117/10 & y= 4/10 = 2/5