Solve the following simultaneous equations 3x+y=11 and 2x+y=8
To solve a simultaneous equation you should number your equations and re arrange one of them to make y the subject. (You could do it the other way and find the expression for x first)3x + y = 11 [1] and 2x + y = 8 [2]. Re arranging equation [1] we will get the following equation by subtracting 3x from both sides. y = 11 - 3x. Then by substituting the expression for y into equation [2] you can solve for x, giving x = 3. Then we can find the value of y by substituting the value we found for x into equation [1]3(3) + y = 11. 9 +y = 11, giving y =2
RA
Related Maths GCSE answers
All answers ▸v = u + at, u = 1 a = -3 t = 1/2, Work out the value of v.
The difference between two positive numbers is 50. The second number is 50 % smaller than the first one. What are the two numbers?
Solve this simultaneous equation: 6x+2y = 26 and 8x + 3y = 32
Work out the value of 27 ^-2/3