Solve the simultaneous equations 3x+2y=8 and 3y+4x=11

Equal out the x terms so 12x+8y=32 and 9y+12x=33Then subtract the first equation from the secondThis gives y=1Put this value into one of the equations so 12x+8=32Solve the equation giving x as 2.

EP

Related Maths GCSE answers

All answers ▸

If f(x) = 5 – x and g(x) = 3x + 7, simplify f(2x) + g(x – 1)


Show that (x + 1)(x + 2)(x + 3) can be written in the form ax3 + bx2 + cx + d where a, b, c and d are positive integers.


Solve the simultaneous equation: 4x-11y=34 and 2x+6y=-6


An isosceles triangle ABC has a perimeter of 16cm. AB = x+3, AC = x+4. Calculate the area of ABC.