Solve these simultaneous equations: 3y + x = 18 and x - 4y = -10.
Write x in terms of y using one of the equations. Then substitute it in the second equation, which is then only in terms of y. Find y. Then you can easily find x.
Answer: x = 6 and y = 4.
TE
Related Maths GCSE answers
All answers ▸x^2+7x+6=0. Factorise the quadratic equation
Solve for x and y: 2x +5y + 5= 0 , 2y + 31= 5x
Given that F(x) = X^2 - 10X + 17. Write F(x) in the form of (x+a)^2 + b = 0, where a, & b are constants.
66 people went on a day trip and each took part in one activity: skating, bowling or painting. 43 were female. 4 out of the 10 that went skating were male. 20 people did painting. 10 males went bowling. How many females did painting?