SOLUTION: Solve 5x+4y=12 and 3x+4y=4 by substitution?
enter your answer as (_,_) please?
I already did this much solved the first expression and ended up with:
y= 1-3x
but now I'
Algebra.Com
Question 742022: Solve 5x+4y=12 and 3x+4y=4 by substitution?
enter your answer as (_,_) please?
I already did this much solved the first expression and ended up with:
y= 1-3x
but now I'm stuck! please help me!
Found 2 solutions by mananth, josgarithmetic:
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
5x+4y=12
3x+4y=4
4y=4-3x
substitute 4y in first equation
5x+4-3x=12
2x=8
x=4
so y=-2
(4,-2)
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Solve 5x+4y=12 and 3x+4y=4 by substitution?
From the "4" equation,
Using the "12" equation,
SUBSTITUTE FOR y found in "4" equation...
.
Can you continue with this from there?
TRY ON YOUR OWN FIRST, AND THEN IF YOU NEED....
.
Back to the y from the "4" equation,
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