Question

Mindy wants to solve the following system using the elimination method:

y = x − 4
y = 2x − 3

What number should the equation y = x − 4 be multiplied by to eliminate x?
A) -1
B)_2
C) -4
D)-6

Answer 1

@GIL.ojei

Answer 2

its 2 not -2

Answer 3

is there 2 in the option?

Answer 4

the option is -2 @GIL.ojei

Answer 5

its -2

Answer 6

ok thanks @GIL.ojei

Answer 7

y = x - 4 -- put in Ax + By + C form
-x + y = 4
x - y = 4

y = 2x - 3 -- put in Ax + By = C
-2x + y = -3
2x - y = 3

so now we have :
x - y = 4
2x - y = 3

to eliminate the x term, you need to multiply first equation by -2