Question

Solve using substitution
2x=y+9
5y=10x-45

Answer 1

if 2x = y + 9

then let y = 2x - 9

make sense?

Answer 2

no really :/

Answer 3

find one variable, either x or y, first

Answer 4

i think ill choose x

Answer 5

so if you get x alone for one equation, you then replace what you get into the second equation and solve for y

Answer 6

so i mutiply 10x on all 3 of the first equation?

Answer 7

o.O? to get x alone? or?

Answer 8

to subtract it with the other equation?

Answer 9

are you trying to solve it by elimination?

Answer 10

no by substitution

Answer 11

if you get Y alone in the first equation it would be what the first person said y=2x-9 then you substitute the 2x-9 into the second equation getting
5(2x-9)=10x+45

Answer 12

10x-45=10x-45*

Answer 13

oh i kinda get it. then you multipy 5 on the parantesis

Answer 14

than you add like terms?

Answer 15

both sides equal each other if you combine like terms you get 0=0

Answer 16

:o o? wow. now i have to solve the other 1

Answer 17

good luck! hope it helped.

Answer 18

its sure did friend=)