Question

x^2-4y^2=9
y-2x=0, solve by method of substitution can someone show me the steps for this problem

Answer 1

y = 2x from the second equation
now replace y in the first equation to get an equation in x only
solve this equation for x
and substitute these value(s) in first equation to find y

Answer 2

second line
replace y by 2x in first equation ...

Answer 3

do u think you can show me step by step

Answer 4

sorry i hate math :(

Answer 5

gotta go sorry

Answer 6

ok

Answer 7

x^2-4y^2=9-(1)
y-2x=0
y=2x
Substitute this in (1)
x^2-4(2x)^2=9
x^2-4*4x^2=9
x^2-16x^2=9
-15x^2=9
x^2=-9/15
=-3/5
x=sqrt(-3/5)
y=2*sqrt(-3/5)
Hope it's clear.
sorry gotta go nw.

Answer 8

ok thanks for your help :)

Answer 9

yw.:)