Question

2y - x=0; 10x + 15y = 105 solve through simultaneous equations
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Answer 1

Step-by-step explanation:

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Answer 2

2y - x = 0

10x + 15y = 105

equation 1:

2y - x = 0

2y = 0+x

2y = x

$y = \frac{x}{2}$

substituting y for x/2 in equation 2:

10x + 15y = 105

$10x + 15( \frac{x}{2}) = 105$

$10x + \frac{15x}{2} = 105$

lcm = 2

$\frac{20x + 15x}{2} = 105$

$\frac{35x}{2} = 105$

35x = 105×2

35x = 210

$x = \frac{210}{35}$

x = 6

hence

$y = \frac{x}{2} = \frac{6}{2} = 3$

y = 3.

hope it helps

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