Solve the simultaneous equations 3x + y = 23 and 4x + 4y = 52
3x + y =23, 4x +4y=5212x+4y=92, 12x+12y=1568y=64y=8sub in3x+8=23, 3x=15x=5y=8x=5
SB
Related Maths GCSE answers
All answers ▸Factorise the Quadratic: 3x^2 + 2x - 1.
How do I make x the subject of the formula?
make x the subject of 5(x-3) = y(4-3x)
We have two straight lines AB and CD. The coordinates of A,B and C are A(1,3), B(5,9) and C(0,8). The point D lies on the line AB and is halfway between points A and B. Is the line CD perpendicular to AB?