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2 years ago

10

Solve the simultaneous equation.

="TexFormula1" title="4x - 3y = 7 \\ x = 13 - 3y" alt="4x - 3y = 7 \\ x = 13 - 3y" align="absmiddle" class="latex-formula">

1 answer:

Lelechka [254]2 years ago

8 0

X = 4 y = 3 4x-3y=7 x=13-3y

4(13-3y) -3y =7
52 -12y -3y =7
-15y=-45
-y=-3 y = 3

x=13-(3*3)
x=13-9
x =4

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defon

I am doing with Question Number 2

Let the two numbers be 'x' and 'y'.

According to the question, the product of two numbers is 14.

$x \times y=14$

So, xy=14 (Equation 1)

Now, one of the numbers is 3 ½ times the other.

So, $x = 3\frac{1}{2}\times y$

$x=\frac{7}{2}y$ (Equation 2)

Substituting the value of 'x' from equation 2 in equation 1, we get

$\frac{7}{2}y \times y = 14$

$\frac{7}{2}y^{2} = 14$

$y^{2} = 4$

So, y= 2 and -2

So, $x=\frac{14}{2}$ and $x=\frac{14}{-2}$

x=7 and -7

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