Question 58202: x+y=4
y=2X+1
Answer by rcmcc(152)   (Show Source):
You can put this solution on YOUR website! solve for x and y
x+y=4
y=2X+1
the first equation subtract x to isolate y
y=4-x
substitute this equation for y in the second equation
4-x=2x+1
add x to each side
4=3x+1
subtract 1 from each side
3=3x
divide by 3 to isolate x
x=1
now substitute 1 into the first equation to find y
1+y=4
subtract 1 to find y
y=3
so x is 1 and y is 3
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