3 years ago

Work out the simultaneous equation for 3x+ 4 = 40 9x– 7y = -13

1 answer:

4 0

Answer:

Step-by-step explanation:

symmmmmmmmmmm

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nadezda [96]

Answer:

Step-by-step explanation:

1. 4x=7(x-3) Reason: Starting equation

2. 4x=7x-21 Reason: Distributive Property

3. -3x=-21 Reason: Subtracting Combining like terms

4. x=7 Reason: Division

4 0

3 years ago

yaroslaw [1]

Answer: There is one solution, -20

Step-by-step explanation:

$-6(x+7)=-4x-2\\\\Distribute\\\\-6x-42=-4x-2\\\\Add(6x)\\\\-42=2x-2\\\\Add(2)\\\\-40=2x\\\\x=-20$

There is one solution, -20

Hope it helps <3

8 0

3 years ago

alexira [117]

The answer is negative two I believe so if I’m right I’m not 100% sure on this one

6 0

3 years ago

Angelina_Jolie [31]

2/21 * 7/8

14/168

divide top and bottom by 14

1/12

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3 years ago

REY [17]

$2:3=7:x\\\\\dfrac{7}{x}=\dfrac{2}{3}\ \ \ \ |cross\ multiply\\\\2x=7\cdot3\\\\2x=21\ \ \ |:2\\\\\boxed{x=10.5}$

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3 years ago