Nicole/Crystal

`````NICOLE AND CRYSTAL'S WEB PAGE`````

PROBLEM: Y=5-4X
3X-2Y=12

(4X+Y=5)2                (4X+Y=5)3
3X-2Y=12                 (3X-2Y=12)-4
11X    =22                11Y=-33
11         11                 11
X=2                                   Y=-3

PROBLEM: 7X+2Y=-1
3x-4y=19

(7X+2Y=-1)2                            (7X+2Y=-1)3
3X-4Y=19                                 (3X-4Y=19)-7
17X    =17                                  34Y     =-136
17         17                                  34            34
X=1                                            Y=-4

WORD PROBLEM:W+P=40
W=WHITE AND P=PRINTED

4.95W+7.95P=28 4.95W+7.95P=282
P=28 W=12

PROBLEM: X+Y=2 .
3X+2Y=5

3X+2(2-X)=5            1+Y=2
3X+4-2X=5                   -1 -1
X+4=5                            Y=1
    -4 -4
X=1

PROBLEM: Y=3X
X + Y=8

X + 3X = 8          Y=3(2)
4X = 8                 Y=6
4       4
X=2
Y=3(2)
Y=6

PROBLEM: Y= -X+6
X-2Y= -6

X+ (-2) (-X + 6) = -6        Y=(-2) + 6
X+ 2X + (-12) = -6           Y= 4
3X + (-12) = -6
3X = 6
3       3
X=2

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