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Solve for X by Graphing | TI-83 Plu...
Solve for X by Graphing | TI-83 Plus and TI-84 Plus graphing calculators
yu hav 2 strate lines:

1...y=-4x+7

2...y=3.5x-9

yu want area belo line 1 & abuv line2

find weer 2 lines meet...y=3.5x-9=7-4x...7.5x=16, so x=16/7.5,  x=2.133333333333333...

and y=7.46666666-9...y=-1.5333333

the point (2.13333...,-1.53333)

If yu thank av y-axis as the left edj, yu hav a triangel with vertikal line along y-axis

& 2 sides that gotu the point (2.13333..,-1.533333)
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