What is the slope by using either substitution or elimination? 3x-5y=21 2x+y1

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Answer 1 · 2018-07-21T12:42:38

The solutions are #{(x=2),(y=-3):}#

Assume that the equations are

#{(3x-5y=21),(2x+y=1):}#

Solve the equations by substitution

#<=>#, #{(3x-5y=21),(y=1-2x):}#

#<=>#, #{(3x-5(1-2x)=21),(y=1-2x):}#

#<=>#, #{(13x=26),(y=1-2x):}#

#<=>#, #{(x=2),(y=-3):}#

See the graphical solution below

graph{(3x-5y-21)(2x+y-1)=0 [-12.66, 12.65, -6.33, 6.33]}