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When using the substitution method, what expression for x in the second equation would be substituted in the first equation? 4x - 7y = -9 x + 3y = 12
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isolate x on one side and put all other terms on other side..here x=12-3y
Change the subject so that x and only x is left on the left side. The right side would be the expression you need.
Oh, @abhi7 beat me ;)
put 12-3y on eqn first
So, for the first equation for x I would put in 12-3y?
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Correct.
Ok, thanks guys.(:
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