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DJBreezy
 one year ago
Name the y value of the solution to the system of equations.
Use substitution:
4x + y = 6
5x  y = 21
DJBreezy
 one year ago
Name the y value of the solution to the system of equations. Use substitution: 4x + y = 6 5x  y = 21

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Jamierox4ev3r
 one year ago
Best ResponseYou've already chosen the best response.1you might have to set the two to equal each other 4x+y=6 +4x +4x  y=4x+6 then 5xy=21 +5x +5x  y=5x+21 y=5x21

Jamierox4ev3r
 one year ago
Best ResponseYou've already chosen the best response.1then you could do this: 5x21=4x+6 since each end equals y. Then solve for x. Once you solve for x, plug the x value into one of the equations and solve for y ^^

Jamierox4ev3r
 one year ago
Best ResponseYou've already chosen the best response.1@DJBreezy does this make sense so far?

Jamierox4ev3r
 one year ago
Best ResponseYou've already chosen the best response.15x21=4x+6 +5x +5x  21=9x+6 6 6  27=9x /9 /9  x=3 \(\color{green}\checkmark\) that's right :)

Jamierox4ev3r
 one year ago
Best ResponseYou've already chosen the best response.1now we solve for y 4(3)+y=6 12+y=6 12 12  y=6

Jamierox4ev3r
 one year ago
Best ResponseYou've already chosen the best response.1you can also check with the other equation 5(3)y=21 15y=21 15 15  y=6 y=6

Jamierox4ev3r
 one year ago
Best ResponseYou've already chosen the best response.1both equations yield y=6 therefore, the value of y is 6. Do you understand?

DJBreezy
 one year ago
Best ResponseYou've already chosen the best response.0so the answer is 6??
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