Question

$2x - 3y = 1.3 \\ y - x = 0.5 \\ cross \: multiplication \: method.$

plzzzzz someone help.

Answer 1

Hi there!
Here's the answer:

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From general form,
f(x) = ax²+bx+c= 0
g(x) = px²+qx+r= 0

Using cross multiplication method,

[ x / (br-ac) ]
= [ y / (cp-ra) ]
= [ 1 / (aq-bp) ]

---------(1)

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Now,
given,
2x - 3y - 1.3 = 0
- x + y - 0.5 = 0

Comparing coefficients with general form,
a= 2 ; b= -3 ; c= -1.3
p= -1 ; q= 1 ; r= -0.5

Substituting values in (1), we get

x / [(-3×-0.5) - (1×-1.3)]
= y / [( -1.3 × -1) - (2×-0.5)]
= 1 / [(2×1) - (-3×-1)]

=> x/ (1.5+1.3) = y/ (1.3+1) = 1/ (2-3)

=> x/2.8 = y/2.3 = -1

•°• x= -2.8 & y= -2.3 are the required solutions.

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:)
Hope it helps

Answer 2

Answer:

Step-by-step explanation: