SOLUTION: Solve the linear system and tell how many solutions the system has: x + y=3 x+2y=4

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Question 1132159: Solve the linear system and tell how many solutions the system has: x + y=3 x+2y=4
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

x+%2B+y=3+.........eq.1
x%2B2y=4+.........eq.2
-----------------------------------substitute eq.1 from eq.2
x%2B2y-%28x%2By%29=4-3+
x%2B2y-x-y=1+
cross%28x%29%2B2y-cross%28x%29-y=1+
2y-y=1+
y=1+
go to x+%2B+y=3+.........eq.1, substitute y
x+%2B+1=3+
x+=3+-1
x+=2
solution:
(2,1)

+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+-x%2B3%2C+-x%2F2%2B2%29+