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Solve the simultaneous equation: 2x + y = 18, x - y = 6

First, we simply label the two equations as 'Equation 1' and 'Equation 2' respectively. So we have: Equation 1: 2x + y = 18and Equation 2: x - y = 6. In simultaneous equations, there are two variables: x and...
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Answered by Harry M. • Maths tutor
4860 Views

x/x-1 - x/x+1 simplify

x(x+1) - x(x-1)/(x-1)(x+1)x 2 +x-x 2 +x/(x-1)(x+1)2x/x 2 +x-x-12x/(x 2 -1)
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Answered by Grace O. • Maths tutor
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Solve the equation: 13y − 5 = 9y + 27.

13y - 5 = 9y + 27 First we must collect all similar terms together on either side of the equation: 13y - 9y = 27 + 5. As you can see, if a term is moved to the other side of the equation, the opposite sign m...
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Answered by Emma R. • Maths tutor
10548 Views

Solve x^2 + x - 2 = 0

(x+2)(x-1)=0 x+2=0x= -2x-1=0x=1
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Answered by Emily W. • Maths tutor
3426 Views

How do you solve a simultaneous equation by 'substitution'?

Firstly, demonstrate with an example: Solve: 3x + y = -9 and x 2 + 2x - 3 = yRearrange the first equation to get "y" by itself by moving parts of the equation to the other side e.g. y = - 9 - 3xSub...
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Answered by Sophie H. • Maths tutor
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