maths simultaneous equations

posted by ben

3x + 5y = 1
4x + 7y = 2

1. Steve

multiply the equations to get

12x+20y = 4
12x+21y = 6
subtract to get rid of the x's
y = 2
now get x: -3

Similar Questions

1. maths pls help

1. Solve the following simultaneous equations: log2 xy = 7 log2 (x^2/y) = 5 2. If log y x =a and log z x=b where x is not equal to 1, express the following in terms of a and b: logy (yz) Solve the following simultaneous equations: …
2. maths

solve the following simultaneous equations using matrices 3x-6y=24 and -4x+5y=-23
3. Maths

Its the old rabbit colony question using simultaneous linear and quadratic equations - and I need help: A colony of rabbits is growing so that the total number of rabbits (R) after number of weeks (t) is shown: on this table. t=5 R=140, …
4. math

solve the simultaneous equations to find the coordinates of the point of intersection for the pair of lines of the simultaneous equations. Then check the answer by graphing the equations 3x-y=-4 2x-y=0
5. maths

solve the following pair of simultaneous equations. 2x-3y=13 3x+y=3
6. Maths

1.Solve the simultaneous equations: 5x + 4y = 13 3x + 8y = 5
7. Maths

Does anyone know who invented simultaneous equations?
8. Maths

Simultaneous equations... y = x^2 - x - 1 y = 2 - 3x Many thanks.
9. Maths

Simultaneous equations not on a graph... = x^2 - x - 1 y = 2 - 3x
10. Maths

t^2 + k^2 = 9 2t^2 - 5k^2 = 6 Solve the simultaneous equations Thanks

More Similar Questions