Question

please give answer in English 2x+y=7
3x+2y=12​

Answer 1

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We have two expressions.

We have two expressions.3x+2y=12

We have two expressions.3x+2y=12 2x+y=7

We have two expressions.3x+2y=12 2x+y=7 And we’re trying to figure out all x and y for which both of these are true.

We have two expressions.3x+2y=12 2x+y=7 And we’re trying to figure out all x and y for which both of these are true.If we solve the second equation for y

We have two expressions.3x+2y=12 2x+y=7 And we’re trying to figure out all x and y for which both of these are true.If we solve the second equation for y y=7−2x

We have two expressions.3x+2y=12 2x+y=7 And we’re trying to figure out all x and y for which both of these are true.If we solve the second equation for y y=7−2x We know that this must be true for both of them to be true.

We have two expressions.3x+2y=12 2x+y=7 And we’re trying to figure out all x and y for which both of these are true.If we solve the second equation for y y=7−2x We know that this must be true for both of them to be true.We also know that if both equations are true, we can plug this value of y into the other equation.

We have two expressions.3x+2y=12 2x+y=7 And we’re trying to figure out all x and y for which both of these are true.If we solve the second equation for y y=7−2x We know that this must be true for both of them to be true.We also know that if both equations are true, we can plug this value of y into the other equation.3x+2(7−2x)=12=3x−4x+14=−x+14→x=2

We have two expressions.3x+2y=12 2x+y=7 And we’re trying to figure out all x and y for which both of these are true.If we solve the second equation for y y=7−2x We know that this must be true for both of them to be true.We also know that if both equations are true, we can plug this value of y into the other equation.3x+2(7−2x)=12=3x−4x+14=−x+14→x=2 We have found that in order for both of these to be true, x must be equal to 2 .

We have two expressions.3x+2y=12 2x+y=7 And we’re trying to figure out all x and y for which both of these are true.If we solve the second equation for y y=7−2x We know that this must be true for both of them to be true.We also know that if both equations are true, we can plug this value of y into the other equation.3x+2(7−2x)=12=3x−4x+14=−x+14→x=2 We have found that in order for both of these to be true, x must be equal to 2 .We also said before that in order for both of them to be true…

y=7−2x

So y must be 3.

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