Solve the following simulateous equations: 3x+y=11 and 2x+y=8
Minus 2x+y=8 from 3x+y=11 so that the y's cancel out (y-y=0).
Then we get the equation 3x-2x=11-8.So we get x=3.We can substitute this value back into one the orginal equations: y=11-3(3)=2 - so y=2.We can check these values are correct by substituting them into the other equation: 2(3)+2=8.Hence our solutions are correct.
CG
Related Maths GCSE answers
All answers ▸Differentiate the equation 3x^4+6x^2-7x+2
The are 10 coloured balls in a bag, 4 red, 3 green, 2 orange and 1 yellow. John picks out balls and replaces them one at a time. What is the probability that the first two he picks are red?
Solve the equation x^2-10x+21=0
The equation of line L is y= 3x+2 and the equation of line M is 3y–9x+5=0. Show that these lines are parallel.