Question

solve the sytem by substitution
x-2y=2
2x=3y=11 solve the sytem by substitution
x-2y=2
2x=3y=11 @Mathematics

Answer 1

are you sure this equation about 2x=3y=11 ?

Answer 2

i corrected it sorry it is
x-2y=2
2x+3y=11

Answer 3

x=2y+2

2(2y+2)+3y=11 -> 4y+4+3y=11
7y=7 -> y=1 then find x
x=2(1)+2 -> x=4

Answer 4

ok so how do you do it if it is like this.
y=3x
x+y=4

Answer 5

substitute to x+y=4
x+(3x)=4 -> 4x=4
x=1

Answer 6

ok, i kind of understand what your doing, it is the rule of the substition i am kind of getting confused about. i see how you eliminate and then divide at the end right? but exactly how are you combining the sets?

Answer 7

just replace the variable

Answer 8

or what about a fraction? y= -x/2
2x-3y= -7

Answer 9

it mean replace y with -x/2
then substitution to 2x-3y=-7

Answer 10

i am having a hard time cuz i was out sick with bronchitis this last week. then the teacher says , here is the homework. get it done so now i am lost.

Answer 11

change y for the second equation with -x/2
so
2x-3(-x/2)=-7
2x+3x/2=-7
4x/2 +3x/2 =-7
7x/2=-7

7x=-14 -> x=-2