Question

x-4y=9
2x-3y=11

Answer 1

solve the first equation for x and the substitute into the second equation

Answer 2

Thats not really helpful

Answer 3

Solve x-4y=9 for x

x-4y=9

x=9+4y

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Now move onto the second equation


2x-3y=11


and plug in x = 9+4y (what we just solved for above)


2(9+4y)-3y=11


Notice now we have one equation with one variable.


Solve this equation to find y


Once you have the value of y, use it and plug it into x = 9+4y to find x

Answer 4

what do you mean its not helpful, i think it is very helpful

Answer 5

you didnt explain anything, that why i said it wasnt very helpful

Answer 6

that is more than i got when i doing this kind of math

Answer 7

ok...

Answer 8

...........

Answer 9

x-4y=9 Multiply this equation by 2 to eliminate x and find y
2x-3y=11

2x-8y=18
2x-3y=11 Subtract this equation from the above to find y

-5y=7
y=-7/5 Substitute this value into one of the equations to find x

x-4y=9
x-4(-7/5)=9
x+28/5=9
x=9-28/5 Find a common denominator
x=45/5-28/5
x=17/5

Therefore, x=17/5 and y=-7/5