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Solve the following simultaneous equation for x and y: 2x + 5y = 8, 4x + y = 7

Equation A: 2x + 5y = 8 Equation B: 4x + y = 7 2A: 4x + 10y = 16 2A - B: 9y = 9, Therefore y = 1 Sub y back into equation A to find x: 2x + 5 = 8, 2x = 3, x = 1.5
ND
Answered by Nicholas D. • Maths tutor
6628 Views

solve (2x+3)/(x-4) - (2x-8)/(2x+1) = 1 leave answer in fraction form

times both sides by both denominators = (2x+3)(2x+1) - (2x-8)(x-4) = (2x+1)(x-4) times out brackets = (4x 2 + 8x +3) - (2x 2 -16x +32) = 2x 2 -7x -4 simplify = 2x 2 +24x -29 = 2x 2 -7x -4 bring x's to one si...
AH
Answered by Amber H. • Maths tutor
3633 Views

6x – 7 = 14 – x

The first thing you need to do is collect all the 'like terms' on the same side of the equation. Start with the 'x' terms and remember to reverse the signs as you cross them over to the other side. 7x - 7 =1...
JW
Answered by Jessica W. • Maths tutor
6992 Views

Factorise 2x^3=10x+12x^2

Move everything to the same side: 2x^3-12X^2-10x=0 2.Take out a factor of 2x: 2x(x^2-6x-5)=0 3.Complete the square on the quadratic: 2x[(x-3)^2-14]=0
FH
Answered by Faye H. • Maths tutor
4097 Views

Solve the inequality 5x + 3 ≤ 3x − 6.

x ≤ -4.5
MD
Answered by Martina D. • Maths tutor
5227 Views