Question

Maths Questions:Simultaneous Equations
1. 4x-3y=14
2x-2y=-7

2. 3x+2y=11
2x-5y=1

3. 5x + 4y = 5
3-x5y=-34

4. 4x-3y=5
2x+2y= -1

Answer 1

which one first?

Answer 2

any :)

Answer 3

cool , well lets begin with first one
4x-3y=14
2x-2y=-7
your equation becomes
4x-3y=14
4x-4y=-14 , i have multiplied equation 2 by 2, now subtract equation one from 2
y=28
and put y=28 in any equation to get x
hope you can do it now :)

Answer 4

thanks :)

Answer 5

similarly you can do the rest :)

Answer 6

change your second equation of question 3 it should be 3x-5y not 3-x5y ;)

Answer 7

it says the answers to the first one are 0.5 and -4? how does that work then o_o

Answer 8

wait a sec let me see again

Answer 9

answer is correct because it satisfies the equation but the one i have solved shows no mistake either , how is this possible

Answer 10

i got x=24.5 and y=28 which is also correct

Answer 11

let me solve the another one , and see what can i get :(

Answer 12

i agree 0_0

Answer 13

4x-3y=5
(2x+2y=-1)*2

4x-3y=5
4x+4y=-2 , again subtract equation 1 from 2
7y=-7
y=-1 and from this we can get x
4x-3*-1=5
4x=5+3
4x=8
x=2 so finally i got x=2 and y=-1 , now what does your answer say?

Answer 14

It said exactly the same as what you got, i think there are multiple ways of answering the question , Thanks :)

Answer 15

i guess so ;) you're welcome :)