Question

Does anyone know how to solve a system by substitution????

Answer 1

Yup

Answer 2

can you help me

Answer 3

This is a pre-question. It would be easier for you to just post the actual equations that need "subbing"

Answer 4

its this one

{2x+3y=0
{x+2y=-1

Answer 5

rearrange one of the formulas to get the answer for one variable
and use this on the other equation to with that variable

Answer 6

yes but i need the steps

Answer 7

can you show me???

Answer 8

e.g.

x = -1 -2y

2(-1 -2y) + 3y = 0

-2 -4y + 3y = 0

-4y + 3y = 2

-y = 2

y = -2

Answer 9

dont forget to click good answer

Answer 10

what about the X

Answer 11

ok so now we know the value of y we use it to work out x

so we know y = -2

x + 2(-2) = -1

x - 4 = -1

x = 4 -1

x = 3

Answer 12

to check use both variables on the other equation

so

x = 3 and y = -2

2(3) + 3(-2) = 0

6 - 6 = 0

Answer 13

dont forget to click good answer :)

Answer 14

thank you can you help me on two more ??