Solve the simultaneous equations 4x+3y=19 5x-4y=47
1 answer:
4x + 3y = 19 multiply this by 4 5x - 4y = 47 multiply this by 3:- 16x + 12y = 76..............(1) 15x - 12y = 141............(2) Add (1) + (2);- 31x = 217 x = 7 Now plug = 7 into the first equation:- 4(7) + 3y = 19 3y = 19 - 28 = -9 t = -3 Solution is x = 7, y = -3.
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