SOLUTION: 4x+3y=9 2x-y=7 Y=2x-7 4x+3+2x-7)=9 Solve each system by substitution

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Question 548420: 4x+3y=9
2x-y=7
Y=2x-7
4x+3+2x-7)=9
Solve each system by substitution
Answer by gsmani_iyer(201) About Me  (Show Source):
You can put this solution on YOUR website!
4x%2B3y=9++++.....+++......++++.....%281%29
2x-y=7++++++.....+++.....++++.....%282%29
From the equation (2), y=2x-7; Replacing the value of this y in Eqn.(1), we get
4x%2B3%2A%282x-7%29=9+++......++.......+++.......++....%283%29
By simplifying (3), 4x+6x-21 = 9
= 10x = 21+9
= 10x = 30
x = 3; (Dividing both the sides by 10)
Replacing the value of x by 3 in eqn.1, we get

4*3+3y = 9
12-9 = -3y
y = 3%2F-3+=+-1
So x=3; y=(-1) Answer.