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The system of equations is coincident. What are the missing values? 3x + y = 7 9x + _ y = _
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@Catlover5925
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.
@cwrw238 so first blank is 3?
yes
and second is 7?
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no 3 * 7
3:9 = 1:3 = 7:21
so second is 21 right
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