Solve for y and x, where x=y+1 and y=2x+3
Simultaneous equations:
x=y+1 y=2x+3
First solve for x. y=2x+3 so first equation becomes: x=(2x+3)+1 x-2x-3-1=0 -1x-4=0x+4=0 x=-4
Solve for y: y=2x+3 y=2(-4)+3 y=-8+3y=-5
TS
Related Maths GCSE answers
All answers ▸There are 7 blue pens, 4 green pens and 6 red pens in a box. One pen is taken at random from the box. Write down the probability that this pen is blue
Factorise this equation and then solve for x) 2x^2 - 3x-2
Solve algebraically the simultaneous equations, x^2 + y^2 = 25 and y – 3x = 13
Work out the point at which the line y = x^2 + 4x + 4 hits the y-axis and the x value of its turning point.