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2 years ago

What is the x-value in the solution to this system of linear equations

Mathematics

1 answer:

Yuki888 [10]2 years ago

5 0

Answer:

x = 4

Step-by-step explanation:

2x - y = 11

X + 3y = -5

Multiply the first equation by 3

3(2x - y )= 11*3

6x - 3y = 33

Add this to the second equation to eliminate y

6x - 3y = 33

X + 3y = -5

--------------------

7x = 28

Divide by 7

7x/7 = 28/7

x = 4

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1 year ago

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2 years ago

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2 years ago

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If a: b= 3:4 then find the value of<br>(6a-3b :(5a + 2b)

KengaRu [80]

Answer:

6 : 23

Step-by-step explanation:

$a : b = 3 : 4 ....(given)\\ \\ let \: a = 3x \\ b = 4x \\ \\ (6a - 3b) : (5a + 2b) \\ \\ = \frac{(6a - 3b)}{(5a + 2b)} \\ \\ = \frac{6(3x) - 3(4x)}{5(3x) + 2(4x)} \\ \\ = \frac{18x- 12x}{15x+ 8x} \\ \\ = \frac{6x}{23x} \\ \\ = \frac{6}{23} \\ \\ (6a - 3b) : (5a + 2b) = 6 : 23$

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