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OpenStudy (anonymous):
Solve by the substituion method 3x-7y=43 9x+71=y
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OpenStudy (saifoo.khan):
have you tried them? where are u stuck.
OpenStudy (saifoo.khan):
?
hero (hero):
Saifoo, not giving answers anymore?
OpenStudy (saifoo.khan):
Heck no.
hero (hero):
I see it as laziness now.
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OpenStudy (saifoo.khan):
LOL.
OpenStudy (chaise):
3x-7y=43 9x+71=y Substitute your y from the second equation into the first equation. 3x-7(9x+71)=43 Now your equation has one variable and can be solved like a normal equation. 3x-7(9x+71)=43 Expand the brackets 3x-63x-497=43 Gather like terms -60x= 540 x = -9 Substitute this back one of the original equations, doesn't matter which one. 9x+71=y 9x-9+71 = y -81+71 = y y = -10
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