solve the simultaneous equations , 5a+2b=23 & 9a-2b=19, algebraically.
find sum of both equations: 14a=42, therefore a=3, substitute 'a' into an equation: (5x3)+2b=23, therefore 2b=8, therfore b=4
RP
Related Maths GCSE answers
All answers ▸3x+5y=7 and 9x+11y=13. Solve to find the values of x and y that satisfy both equations.
Solve for x in the following equation using the quadratic formula, completing the square and factoring method: 2x^2-x-1=0
Solve the simultaneous equations: 2x + y = 18, x - y = 6
Solve y = x^2 + 3x + 2 = 0