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Mathematics 21 Online
OpenStudy (anonymous):

The system of equations is coincident. What are the missing values? 3x + y = 7 9x + _ y = _

OpenStudy (anonymous):

@Catlover5925

OpenStudy (cwrw238):

for the 2 equations to be coincident then ratio of the coefficienst of y and the ratio of the numbers must be the same as ratio of the coefficients of x.

OpenStudy (anonymous):

@cwrw238 so first blank is 3?

OpenStudy (cwrw238):

yes

OpenStudy (anonymous):

and second is 7?

OpenStudy (cwrw238):

no 3 * 7

OpenStudy (cwrw238):

3:9 = 1:3 = 7:21

OpenStudy (anonymous):

so second is 21 right

OpenStudy (catlover5925):

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