SOLUTION: i need your help in solving this equation: using comparion method y=2x-3 y=-1/2x+4 and this one using substitution method x-2y=3 2x-3y=y thank you so much, ana

Question 424971: i need your help in solving this equation: using comparion method
y=2x-3
y=-1/2x+4
and this one using substitution method
x-2y=3
2x-3y=y
thank you so much, ana

Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

.....1...
....2
first multiply second equation by then add 1 and 2

.....1...
....2

.....1...
....2
.....1...
....2
------------------------ now add them

}

....now find

.....1...

check:
....2

2.

using substitution method

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION

Solve:
We'll use substitution. After moving -2*y to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that y=6=0. Since , x=15.

Answer: .

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