Question

10x+7y= 49

10y-x=70

use either elimination or substitution

Answer 1

@ganeshie8

Answer 2

u familiar wid substitution method... ?

Answer 3

idk this is a review from algebra I, im in geometry, so i don't remember how to do algebra stuff

Answer 4

its okay :) its simple, il walk you through

Answer 5

ok thanks

Answer 6

Given equations :
10x+7y= 49 ------(1)

10y-x=70 --------(2)

Answer 7

from (2),

10y-x=70

x = 10y - 70,

substitute this x value in (1)

Answer 8

10x+7y= 49

10(10y-70) + 7y = 49

100y - 700 + 7y = 49

107y = 749

y = ?

Answer 9

7. ok thanks!

Answer 10

y=7, you need to find x also

Answer 11

aw mann

Answer 12

so how

Answer 13

plug it in the 1st equation?

Answer 14

yes, looks you're back to algebra brilliance again :)

Answer 15

haha ok

Answer 16

i sitll have 11 more oh mygod!

Answer 17

i got 10x=0 so its no solution right?

Answer 18

yea it is, i remember my teacher saying that one is no solution

Answer 19

10x = 0

x = 0

Answer 20

so the solution of the system is,

x = 0
y = 7

Answer 21

yup