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Mathematics 8 Online
OpenStudy (anonymous):

Solve the linear system by using substitution 4x+3y=0 2x+y=-2

OpenStudy (adamaero):

solve one of the equations for x or y (step 1)

OpenStudy (anonymous):

@adamaero can you show me step by step?

OpenStudy (adamaero):

pick something to solve for first

OpenStudy (anonymous):

4x+3y=0

OpenStudy (adamaero):

x or y?

OpenStudy (anonymous):

y

OpenStudy (adamaero):

3y = -4x then divide

OpenStudy (adamaero):

substitute that value for y into the other equation to make a "new" equation

OpenStudy (anonymous):

Is that it?

OpenStudy (adamaero):

yes, you should end up with one equation with no ys solve for x, and do the same thing to make another equation (solving for y) or substitute the value of x for y in either equation

OpenStudy (anonymous):

@adamaero thank you!

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